You should simply use what is recommended, end of story. Most cars run regular, so put regular in it if that's what your user manual says. It all comes down to ignition timing, some cars can take advantage of more spark advance and make more power or more efficient power (and these cars will recommend premium). Also, at 13:46 the display shows regular fuel with 7 ppm hydrocarbons (and 6 at 13:38), but when they get into the premium fuel they don't display what the ppm is, just a random display with dyno numbers. Not that premium burns cleaner (that's not it's goal; it has more detergents for engine cleaning and a higher octane rating), but there's no reason to be misleading about it. Why not tell us what the numbers are?
+Engineering Explained and see the co2 nunbers ;) they are different too. most car require regular, premium rarely is required is normally sugested not required ;) that's diferente
TheGrundig81 no, in most if not all high performance engines, save for some direct injection engines high octane or premium fuel is REQUIRED. No iffs ands or buts
User Name To be fair, there's almost always ifs ands and buts. Manufacturers aren't going to pump out cars that break when you use the wrong octane gas. Some people will use regular regardless (and sometimes, though rare, it may be all that's available). Engineers account for this, so when you use a lower octane fuel the ECU retards the timing so you don't have to worry about knock. Now I'm referring to production cars, and you certainly shouldn't drive it like you stole it on lower octane, but generally it will not cause problems. Kit blocks built for performance will generally be tuned for a very specific fuel, and you'll have to alter that tuning if you decide to cheap out.
Engineering Explained I disagree. I worked for a dealership group for several years while in college. We got performance models of various sorts in all the time with torched pistons, rings, valves, etc. Vast majority of the time we would send the fuel out and it was 87 octane. We would finish up with a nice stamp on the customers 8 month old car work order that said claim denied. The only outlier was Subaru. We would get the occasional turbo model that would blow ringlands.
All of you still come from another planet . . . Since all of you think your so smart why don't you determine how 8 grams of thorium may power a car for 100 yrs? That would be noteworthy and do it for free so we can all have free energy to fight the slave masters, yes?
+symawd they are doing this for the vast majority of people who do not own a car that requires premium. The point of this video is to show that the cars that just about everyone drives on their daily commute do not need the premium gas and that they are spending extra money that is not required.
kseifful But they make it seem like every car should be using regular. That is not the case. They should have shown the tests both ways. My daily driver recommends premium.
+symawd I think you're missing the point of this video Symawd. They're primarily focusing on cars that require regular fuel and how in some places they recommend putting higher octane gas in cars that won't benefit from it. In cars that require higher octane, it needs higher octane. A car that recommends regular won't benefit. That's the main focus of this, mainly people being ignorant about what they should buy.
Dan P I think you should Do some research before Commenting Stupid Shit. 2014 Nissan maxima engine raito is VQ35DE, Bore 95.5mm, Stroke 81.4mm, Rod Length 144.2mm, Compression Ratio 8.5:1 It even says in the Car Gas cap use premium gasoline
yoga teacher probly gonna go buy a tesla, then cry about the erratic weather patterns, lol... we all know by now mining lithium requires mowing down entire mountain ranges, which is where weather is made😉 thats 5th grade earth science...
@@woodworksparadise6036 she don't need cars she needs bicycle. Its good for both the environment and also her physical health. Or use public transport.
Check your car's manual (or inside your gas door) if it says: Regular = Premium NOT needed Premium Recommended = Premium NOT needed Premium Only = Premium needed
Exactly my Lexus recommends 91 octane or higher but you can use regular if absolutely needed but not recommended. I’ve ran my car on regular and it ran horrible. It’s not good for your knock sensors to run regular if your car recommends premium as the pistons won’t burn all of the fuel that is being injected!!
Higher octane is made for higher compression engines. These engines also knock sensors to compensate for poorer gas. You don't need premium gas on most daily drivers. If you put regular gas into a high compression high output engine it will have less performance. Basically high octane self ignites at a high compression. I hope this helps.
High compression performance engines need higher octane. Higher octane prevents pre-detonation, keeps the mixture from just exploding under higher compression advanced timing. The man with the Corvette, yes engine management will allow for use of regular gas by retarding the timing and changing the fuel timing and rail pressure but the performance also went out the window because the engine is de-tuned. The econo-box used in the test does not need it, in fact a normal V8 Mustang does not need premium, try to get performance from a Mustang GT500KR on regular though. in 1972 I had a 1956 Chevy that I was real proud of, engine started off a 327 CID small block Chevy, with Corvette heads, bore increased 0.060", TRW popup pistons @ 11.5:1 compression ratio, don't remember the grind (lift, duration and overlap) of the cam but she idled at 1100 RPM sounding like 400 RPM. She would have PUKED on what they call premium now, but the common car on the road today (not hot rods or performance cars) have no use for high octane gas.
Eldor Luedtke It's worth mentioning that a lot of "econo-box" cars these days have turbo charged eco options. Those need higher octane fuel to appreciate the fuel efficiency benefits of said lower displacement turbo engines. It often makes me wonder if the fuel economy improvements are worth the increase in fuel price.
Eldor Luedtke What did the 'Corvette' guy say? He said for 'regular driving' regular is fine'...and I assume he upgrades to a higher octane for racing on a track. (as you know, the 'Vette' has different driver-controlled settings for engine performance, so obviously under 'max power' settings, he'd use a 'hotter' fuel)
Eldor Luedtke Not when the turbo is only there because the engine is so pathetic without it. Going back to Ford as an example, they manufacture a 1L 3-cylinder turbo charged Fiesta. That's about as econo-box as you can get :P
Gerry Nightingale Yes, and performance was lost, my point. Premium gas is not hotter, it resist pre detonation better. Regular gas has as much energy as premium but would explode making that ping or clatter in high compression high performance engines.
That's a common misconception about fuel octane levels. High octane (basically 97 onwards) burns more evenly, meaning that you get a more even combustion in each cylinder, making your car accelerate smoother, and runs more efficiently.
@@miahstalings8572 once a year sure, if you drive your car once a week... the more you use your car, the dirtier the oil gets. So this one year rule of yours won't work for everyone, just change it on the recommended mileage number's. Or just take the extra 30 seconds and check the oil yourself and judge when to change it. It's not that hard to tell if oil is bad, so everyone can do this.
Premium is high octane gas for use in high compression engines to prevent knocking. My BMW has an 11.5 to 1 compression ratio and runs poorly on regular.
In a nutshell, Premium gas simply has a higher octane rating than Regular. Higher octane rating means better detonation resistance, which is useful for engines which have high compression ratios (more than, say, 10:1) or are equipped with turbos or superchargers. If you drive a 'normal' car, regardless of its price, you're probably fine with Regular.
THANK YOU!! I have tried to explain this to people, hence why diesel has an octane of 40 because compression detonates it. Using high octane fuel in a regular vehicle can also create incomplete burn and damage O2 sensors and catalytic converters.
DarkKnight500. Some cars recommend regular....but high test, higher octane will help keep your fuel injectors clean...:-). Doesn't hurt to load up every now and then...:-)
Yeah but they might be lying too and telling u to put super clean gas in when obviously its messing with the environment from burning pieces of gas coming out of the gas pipe. Do not read the manual. Go get a professional person to do a test on the car and see what u need. Simple
Man people need to educate themselves. High Octane fuel is not for better gas mileage or "cleaner fuel". The higher the compression in the engine, the higher octane needed so detonation will not occur with the low grade and ruin your engine. High compression = higher octane. Look in your manual to see what octane it was designed to use.
yeah it's amazing how many people don't bother to understand how things work.. news reports like this just confuse them further. some engines are designed for premium, typical commuter cars run regular. just run the gas the car is designed for and leave it at that.
He didn't ask why it was made available for sale, he asked why it was being "sold"(marketed) to people who don't need it, people who need something else.
@@skoronesa1 true, but some vehicles, like my own, do require high octane gas, in Germany all of their gas is 90 and up, so it makes sense that their engines are built for it
+dregsta its pretty much the same. its because canada uses a different standard to USA, and Europe does in Europe etc (where we use metric as well I might add LOL) We use RON Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane. in canadia they use MON Motor Octane Number (MON), is determined at 900 rpm engine speed instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern pump gasoline will be about 8 to 12 octane lower than the RON, but there is no direct link between RON and MON. Pump gasoline specifications typically require both a minimum RON and a minimum MON in America they now use the AKI index Anti-Knock Index (AKI), and often written on pumps as (R+M)/2). It may also sometimes be called the Posted Octane Number (PON). In the end the fuels remain about the same Vs other countries and their respective numbers. Supreme in Canadia is the same as 98 octane in Europe and 91 in US of A Side note. Canadia is about to shift to the AKI index as well.... Sigh lets all just get along and use Metric system and the RON. world peace achieved!
+jack black Canada isn't "just about to shift to the AKI as well". It has been using AKI (RON+MON/2) for many years. Certainly as long as I have been driving and that is 39 years.
+Qiuyuan Chen That's the octane number, a measure of a fuel's ability to resist "knocking" or self-combustion. It has nothing to do with the purity or cleanliness of the fuel. Some fuels can rate over 100 on the octane scale.
+Ilusionista Cule thanks,I knew it. However, that explains public needs some basic scientific ideas. If I don't get wrong, Hydrogen is around 135 based on RON.
+Doug Vandegrift exactly, its about the octane rating for knock prevention. At least here in the US there are standards to adhere to for consumer fuels.
+Doug Vandegrift no no no... If you engine is not built for performance than you do not need to put a higher octane fuel in it. Even if it says to put a higher octane in. The more air to fuel ratio (say a turbo / supercharger) than yes you should put in a higher octane because then engine will be under more load and it will cause less wear on the motor (Higher octane = cleaner burn). But if you're engine is naturally aspirated, more than likley you will not need a higher octane. Of course there are some exceptions for some vehicles.
Justin Dahl I'm just saying you should always put in what your car's manual specifies. I have a Mustang GT and it recommends 88 octane or higher but to not go any lower even in higher altitudes. It also specifies that there's no need to put in higher octane as this will not increase efficiency or performance. Yes I agree most vehicles only need lowest unleaded gas and no plus or premium but the manual will specify as such. Putting in premium every now and again really doesn't add any benefit. In short know your octane number and stick close to it.
I had a 1993, a 2001, and a 2006 Ford Taurus. Those cars would ping like crazy on the highway if I didn't use premium. Except for the Fords, and having had more than 20 cars in my lifetime, I always used regular gas. Don't get me wrong, those Fords were some of the most reliable cars that I've ever owned.
ford taurus v8... the sleeper car. its fast but it looks like a soccer mom car. i have to agree with you on this side. some car do required premium gas. not all cars is the same. it depend on the ecu and the compression of the piston i believe. i have experience of witness, friends car that required 91 and put in 87, it would ping specially on a hotter days. ecu, normally would change its timing to reduce its pinging if the knock sensor detect it. thats how people feel its losing performance since the timing either retard or advance to protect the engine from ping. this show didnt even bother poping its gas cap to show what rating of octane its required. cars that required 91 can used the middle 89 one and be fine.
@BlueRice a v8 taurus was an SHO and would have required premium of a certain octane that engine was special built as the "performance " engine for them. It was a special built motor for Ford by Yamaha
Some cars do require premium and that's a fact. I had a subaru wrx turbo and now have a subaru forester xt turbo and they both say premium is required or recommended. In my wrx I accidentally put regular in it, my car was knocking, hesitating, and slow acceleration. As soon as I was able to put premium back in, all those symptoms went away. My forester says recommended unlike my wrx which said required. I have used regular and premium in my forester. The acceleration is noticeably quicker with premium, and according to the on board computer the mileage is better with premium. So do your stupid study over, and use cars that actually require premium, and try to tell me that it doesn't make a difference.
tong po Higher cylinder compression causes the fuel to explode sooner and faster. It can be described as more of a flash than a burn and the power of the explosion can be gone before the power stoke is complete. The higher the pressure the faster it burns. Premium fuel is designed to burn slower, so it'll still be burning all the way through the power stroke. In fact, before knock sensors could control timing it was common to still have unburned fuel left during the exhaust stroke. Normal cars with normally lower compression burn regular fuel just fine since the compression is matched to the octane. The reason your Subaru had problems is because the regular fuel burned up before it got done pushing the piston; multiple explosions at the beginning causing the knock and burning off before pushing the piston all the way causing low power.
tong po I think most turbo vehicles are required or recommended to use premium. The way I think about it is, the mileage increase from the turbo evens out the cost for premium.
tong po wich is true ive checked everywhere asked almost every gear head i know and any mechanicwho knew and they said the same thing for some cars it works beter and for some it dosent
octane rating used to refer to the percentage of eight carbon chain hydrocarbons in fuel, which burn slower than typical 6 chain hydrocarbons. Modern fuels use other additives to slow the burn rate, so octane rating refers to the rate of fuel burn. Slower burn means less detonation in high compression engines. Premium fuel just burns slower. One way to increase octane rating is add ethanol, and some premium fuels do this. if you want truly clean burning fuel, use E85, but you need a FlexFuel motor to do this.
+okleydokley explaine me why i was wrong, u said the same thing except that u did a mistake and said six carbon chains, but gasoline is made of heptane and isooctan
This is the most amateurish automotive test I have ever seen. CBC you have no idea what you are doing. Plus that Mark guy is full of crap, for anyone who doubts me look up what Octane rating actually is, it's the resistance to detonation.
I was calling bull too. I daily a 02 mustang with the 3.8. With regular i am making maybe 150 miles to a tank(15 gal. tank) and with premium im making 200-230 miles to a tank.
Simple test: put 87 octane in your car and drive it a LITTLE bit harder than you normally would. If the engine feels sluggish or "sleepy" you have to use 89 or higher even if the fuel cap door says you can use 87. My VW fuel door says I can use 87 but I never do that. Last time I tried it, the car snored and refused to move normally. I got passed by 10 year old family sedans on the highway. Waited until it was half empty and topped it off with 93. Everything was back to normal!
@@WSKRBSCT correct 👍 pre-ignition, or "knock" is when the fuel ignites before the spark plug ignites it. This "detonation" is very damaging to internal engine parts and can cause catastrophic engine failure. Higher octane fuels resist this detonation because they have a higher ignitability rate, AKA flash point but when they do ignite they do so with more energy. Guys all this info can be found via a 10-minute Google search. I could assume that the Civic in the video was producing higher emissions due to unburned fuel, AKA hydrocarbons. Simply put, there was so little air and fuel in the combustion chamber, it was hard for the ignition system to completely burn the higher octane fuel. Now take a high-performance vehicle where the air-and-fuel is very densely packed via boost or high compression, suddenly that air-and-fuel mixture is very easy to get ignited under heat and pressure. Now that mixture pre-ignites AKA detonates. Thus the need for a higher octane fuel. Keep in mind as the boost, compression and power goes up, so does the need for higher octane fuel! Infact, some very high performance street engines that guys have modified for performance, (high compression pistons, aftermarket cam, free flowing cylinder heads, hot tunes, advanced ignition timing, big turbo, injectors or large carb etc) need E85 which is equivalent to 103-105. Furthermore, some race engines run on C16 116 race gas! That is simply not needed on your mom's 96 Honda Accord Automatic however, and since most people drive average cars, that's the point they're trying to make most people do not need premium fuel.
Street48 - horsepower numbers do increase, but if they wanted to measure that they should have done a wide open throttle test to see the max numbers. Otherwise you're just measuring how much horsepower it takes to spin the dyno drum and all of the losses involved in doing so (tire deformation, friction, etc)...
***** Ignition timing has a lot to do with horsepower. The more you can advance the timing, the more complete the burn - the more efficient/powerful the engine is.
I used to work for gas stations, people asked me this question all time which is better (Which is the better gasoline). ONLY USE the gas that the Manufacturer Manual tells you to use, Most cars do not need premium fuel. And That MIDGRADE fuel you pay is actually Premium Fuel & Regular Fuel being mixed TOGETHER and then sent to your car thru the nozzle. It is NOT stored in its separate fuel tank underground like most people think it is.
a car engine requires a certain "octane rating" to reform efficiently. High performance, naturally aspirated enginges require "high octane" to avoid self-destruction. Newer computer controlled cars can detect "knock" (destructive pre-ignition), and alter the engines timing advance to stop the pre-ignition. Horsepower and efficiency are lost. Also "lead additives" were introduced to minimize metal-to-metal wear; valve seats and stems. "High octane" gas normally costs noticeably more.
Higher octane fuels are for engines with higher compression. Put low grade fuel in a high compression engine and you can get pre detonation. Fill your car with what the manufacturer requires. Most cars are designed to run off low grade fuels. Some suggest mid grade. Most all high end require premium fuel.
True. I have a budget Hyundai and the manual says to use regular octane gas, and only regular octane. Apparently higher octane fuels can damage the engine.
Allen, is this why some cars have engine knocks? I noticed on my Harley, that if I put in regular, under acceleration stress (I am gunning it) I will get knocks and hesitation at times. When I put in premium, I do not get that at all. Now the engine I have is an older 1999 Screaming Eagle, so it is considered higher performance. So is predetonation causing a "misfire" at the wrong time resulting in knocks/pings? So the regular gas is detonating in the cylinder before the pistons go top dead center? (Is that the right term???)
Gerald Burgos you now have a higher compression engine if you did pistons that raised your compression ratio. Your 1999 Harley does not have an ECM that can adjust your engines timing. It is an AIR cooled engine also that doesn’t have the ability to run at a more constant temperature. You get higher octane gas at lower altitude. Thin air at high altitude can use less octane which means less engine or no predetonation. You can run Shell, Exxon, Chevron, Texaco, etc gas and be more assured of the octane ratings. My Harley is modified at 10.0:1 compression ratio. Gas at convenient stores and especially Valero gas causes engine knock which can put a hole in your piston. The single best thing you can do is install an adjustable ignition. My favorite is Daytona Twin Tec model TC88 on my ‘01 FLHR. You can set it up for 10 different run conditions. I travelled from sea level to 10,000 feet of altitude in Colorado and just dialed in a preset curve to eliminate knocking. Another excellent one is from S&S that can detect engine knock and adjust timing. I used one of these but it did not work well. I now feel this was due to the HSR 42 flat side Mikuni card that can rattle. I also have a high lift short duration cam with heavy valve springs that knocks a little bit. The rocker shafts were very noisy on mine until I installed rocker locks. www.amazon.com/ROCKOUT-Rocker-Products-001-inserts/dp/B014O6XOZS. This was after I tried the S&S ignition. The tapping noise is so quiet now. The guy I sold my S&S ignition to has no problems and it works PERFECT on his engine. I also tried the Screaming Eagle ignition but it didn’t give me results I wanted.
The majority of motorcycle engines, as well as any small performance engines, make incredible power for their size and weight. To do this, they need incredibly high compression ratios, so much so that motocross racers pay in excess of $20 per gallon for high octane fuel. Considering this, I would say it is highly likely that you are experiencing pre detonation from low octane fuel.
I agree but in my experience in running low powered cars and high powered cars the premium gas in Europe at least works better no matter what type of car you use it in.
Петър Баджаков that’s assuming people own race cars. Luxury vehicles also run off premium. Such as Cadillacs Lincoln’s Jaguars and Buick’s. You might notice loss of horsepower in a sports vehicle but what about heavier luxury models that aren’t necessarily meant to go vroom vroom skurt skurt?
Петър Баджаков i totally understand about the silence. I love a fast vehicle don’t get me wrong, but I love the feel of a land yacht. I love pressing my foot on the gas and hearing no sound. I enjoy people asking if my car is on when I stop at a red light because of how silent it is. I’ve never been a fan of foreign luxury. I stick to American luxury even if it isn’t the most flashy. I feel like I’m an old geezer when it comes to vehicles. I like heavy and slow. But that’s never stopped me from admiring a Japanese car. I have a soft spot for 1g crx’s and 3g Civics.
That's what I'm saying. The people at the manufacturing company assembled the car, engineered the car, and knows what's best for the car. The manual should override any other recommendation given by other people.
The octane requirement of an engine has mostly to do with the compression ratio of engine. It's not going to help to put higher octane in than necessary. It will harm an engine with higher compression to put not enough octane in.
I know from personal experience that my vehicle runs better (quicker acceleration, improved performance, improved mspg by 5 miles) since I switched to premium gas two years ago. Two years is a better test than a 10 minute one. Regular is the manufacturer's recommended fuel for my vehicle.
My first Audi I own said to put 91 in . So my first time filling it up I put 91 in, ran great, smooth , etc. My wife later on in the week took the car and had to put gas in it. The following morning I took the car out and I noticed the car acting kind of sluggish just didn't feel the same at all. I had asked my wife questions and then asked her about the gas and she had put in 87 regular. So next time around filled it up with 91 and YEP what a freakin difference ! Back to normal ! Powerful no sluggish feel nothing. I respect what these people are trying to do but all in all it really does matter what you put in your car.
A lot of people have said it above, but octane rating is about resistance to combustion under compression. So with a turbo in your 1.8T (maybe 2.0T if you're a newish Audi fan) you need that extra resistance to premature "lighting of the gas". The 87 was igniting before your piston had squished it down fully, so was causing engine knock (basically, unproductive or counterproductive burning of fuel within its cylinder). Vorsprung durch Technik!
Did you watch the video. It said to put in what the manufacturer recommends!!!! In your car you said it recommends 91. Most cars don't need anything higher than 87.
I have a new Subaru Crosstrek and I was somewhat disappointed with the acceleration. I considered selling the car with only 2k on it until I filled the tank with premium. I noticed a huge difference in how it shifts and accelerates.
Maybe because she has to travel very long distances everyday? Would you ride a bike say 40 km on a winter day when it’s -20 and snowing? I somehow doubt it!
Depends on the vehicle for sure. For example my Camaro SS uses a V8 engine and If I were to put regular gas the performance and MPG would decrease on it. On top of that I will probably hear knocking noises in the engine. IF your car requires or even is recommended it usually is correct according to the owners manual.
This is the most ill-informed news report that I have ever watched in my life. It's laughable. You have to understand what knock is. The octane number (87,89,91,93) is simply the fuels ability to resist knock which is another term for pre-ignition or detonation. This is typically caused by either advanced ignition timing or high compression ratio. Most turbo-charged engines for example absolutely require premium or they will knock and cause damage to the pistons and other components. Regular (87) is the most widely used fuel in America however and using premium in a car that only needs regular (87) will not help anything. In fact the higher the octane you go the less energy there is per volume of fuel so in a car that only needs regular (87) you would use slightly more premium (93) gas to achieve the same power output that you could achieve using lower octane fuel. Feel free to do your own research because this whole video is useless, Engineering Explained has some great videos explaining the terms i've mentioned in this comment.
Good point besides the fact that shell v-power nitro+ doesn't contain any ethanol, thus boosting its energy per volume. 91 octane with no ethanol has ROUGHLY and I say ROUGHLY 4% more energy per volume than 91 octane E10 (10% ethanol blended gasoline). I personnaly use 91 octane from Ultramar here in my town there is a pump where it's specified wich fuel is blended and wich isnt and that specific location pumps 91 octane no ethanol (2ZZGE with 11:1 C/R engine with 91 octane recommended by manufacturer)
WTF??? You say the video is "ill informed" meaning the information in it is incorrect...and yet...the video demonstrates precisely what you say is correct.
I just tried to say what you said. But if I did. I’d get everyone confused. You should do the video. This guy in the video trying to explain hasn’t any clue.
FeldwebelWolfenstool ahahaha, as if minimum wage workers would know the chemical formulation of the gas stations they work at. It's like people walking into retail stores like Walmart, Best Buy, Target thinking they're talking to rocket scientists when they ask a question about a product. All they do is bullshit you, read the box, and sound confident so you feel satisfied. aha.
misterfunnybones You rarely need Jet B. I have a small reserve for my Chinook and Concorde if we ever get a day where it's -40 or below or I have to fly in arctic climates. Frankly, I prefer taking the Space Shuttle for longer-range distances.
Whatever the owners manual says in regard to fuel grade and oil grade along with oil change intervals are the holy grail for that vehicle, and the key to minimizing engine wear for long engine life.
Agree on gas. Oil change interval recommendations are too short. I use amsoil synthetic and change oil every 25,000 miles or 1 year. 287k on the engine and still gets 37mpg.
@@fknmonty I'm pretty passionate about this topic because we have all been mislead by the status quo. I've done a 3rd party oil analysis through Blackstone Laboratories at 25k and the oil was "Good for continued use." Hard facts and number there. Amsoil recommends 25k for their signature series oil for "normal service," though most of their filter are 15k. Amsoil has also done fleet testing on Las Vegas taxi cabs with these extended drain intervals with great outcomes.
@@7joshallen7 what kinds of vehicles where used in the study. If their n/a small engines it makes sense. But if they're not n/a or bigger engines you just can't do that.
The Mark guy is ignorant. "your car will change your timing to get rid of your knock" Retarding timing also decreases hp. This guy can go ahead and keep putting 87 octane in a Corvette with 11:1 compression ratio and I'll keep making fun of him. There's nothing worse than someone who is arrogant about being wrong.
***** the corvette guy prob. noticed the semi truck that delivers the fuel to gas stations and noticed there isnt 3 trucks,not 3 tanks? lol,idots dont realize the gas is the same and its up to the driver of the truck to add the octane to each tank,and my friend who was 1 of these drivers told me he never added anything.lol only true idiots would fall for this scam
***** first off the show is based in canada and im american so i cant speak for the diff. that may apply,but.....you do know that about 98% of bottled water you buy is nothing but tap water put in a bottle right? you do realize that when something thats marked as organic means 1 thing and 1 thing only,it was grown from dirt? it in no way implies its natural,no more than a bottle of water marked with some fancy french name.you do realize that what you said as an answer is that you "trust" the gas companies to add octane to fuel,be it added at a refinery or at the station,is just dumb? sure,just trust the insurance companys to rate the safety of a car too,lol.you know why the original hummer was discontinued by g.m.? because it would cost to much to meet the insurance companys safety standards LOL!!. the hummer was an armored truck,bullet proof,same as the military used.but.....,it didnt have an airbag LOL! when a company is out to make a profit,they do so by feeding off idiots like the woman driving the honda in this video,and she then blames the companys for her pure stupid? lol
+Atticaz I know a ECU tuner, he shared some of his findings. He had a Seat Leon Cupra 2,0 TFSI in the shop, the owner had 95 octane in the tank (EU rating) The first measurement was 213 HP (it's rated at 240 HP). He sent the customer home again, to return after running it empty and filling with 98 octane a few times. New measurement with 98 in the tank and stock ECU = 251 HP. That's a difference you can feel, i hate that this clip nearly didn't talk about this. Small turbocharged engines are getting more and more common.
As a mechanic i wrote to Petro Canada reguarding Ethonol in the fuel. The industry has had so much problems due to that and no one wants to admit to it. However i did get a response from Petro Canada stating that their High test does not contain ethonol. That is the only good thing i could say for high test. I have never put it in any thing I have owned. Higher octane burns slower and will increase HC and is worse for the enviroment so. As well ethonol makes a mess of engines. GM has had many published problems with their flex fuel due to this.
Even then Ethanol causing issues depends on the particular car, the materials used in fuel system components, how often the car is driven/refueled, how the ECU or carburetor is tuned, etc etc etc. Most cars on the road today won't have issues with ethanol unless they sit for months without running, usually you only see problems with ethanol as a fuel in cars made before the 90s, and even then it depends on the conditions the car is put through. As someone that tunes Bosch ECUs and wrenches on a lot of cars both at work and in my free time, Ethanol is oftentimes beneficial if used properly, and in a performance application, it's great for both making a lot of power (by having a significantly higher octane and much faster rate of expansion during combustion, allowing for timing to be advanced significantly, and producing less heat, at the cost of taking on water easily, requiring a richer fuel mixture to burn properly as opposed to gas, and having properties that make starting an engine in really cold weather quite difficult without a fuel tank and fuel filter heater. It definitely did leave a huge mark though when it was first introduced.
Premium(Higher Octane) is for high compression engines to prevent premature detonation only. Save your money and only buy regular gasoline if you have a regular joe car. Period.
1:51 The whole video could've been over there. USE WHAT YOUR CAR RECOMMENDS! This video is made for, "regular people with regular cars" in which case, yes, y'all don't need premium. But stop making it sound like a scam...
Did you also watch the actual expert's testimony who drives a corvette and puts in regular? Last I checked a corvette isn't a regular car and he's using regular gas (even though it says on his gas cap "Premium only" and as such the video probably did need to be longer to explain why he does so and the research and testimony of experts on the affects of regular vs premium gas on vehicles.
Dylan k - it didn't say premium only it said premium recommended. Some (not all) premium only cars will have detonation issues if you use regular(some do not have knock sensors). Premium recommended cars do have knock sensors and will pull timing when run on regular if they start to have detonation (pre ignition) issues.
All cars that have computers maybe won’t show the difference because it was set in the computer how many miles per gallon you will get, compare to old cars that don’t have computer.
You have more to worry about than just the octane number you also need to either have high strength valves and seats to run modern gas in an old car or buy an additive like zinc to lubricate the older valve train components. Why do we have to do this ? the oil companies removed the lead lubricant that was needed for the emissions problems.
There's a Gas Station close to me, and I spoke to the driver of a Tanker Truck who comes in every week to fill all the pumps. He told me no matter which kind you choose, it's all the same Fuel. All you're really deciding is Which Price to Pay. If you prefer the higher prices, you're not doing anything for your car. All your doing is making the Fuel Companies Celebrate because You Fell For It!
FYI for those who didn't know, engines have what's called a compression ratio, so for example an engine with a 1:9 compression ratio is designed to be used with 90 octane gas and if you fill it up with premium it will run hotter because higher octane gas burns better, but if you have a 1:12 engine which is designed for high octane fuel and you put regular in there, it will run really sluggishly because the engine will not run properly, you can't just say that premium gasoline is bad for your car, it depends what is your car designed for...
Lower octane gas burns better actually. Higher octane gas is just regular gas with delay added so the fuel doesn't ignite too early in the compression stroke of the piston. Cars built for premium using regular will have the gas igniting too soon in the engine. Cars built for regular but using premium are just throwing money away.
@@larryhouse3776 I think that might be a bit misleading to say lower octane "burns better" on account that diesel fuel has a very low octane rating, and yet gasoline/petrol is much more flammable. I don't imagine there's much difference in flammability between 87 and 91 octane fuel, but 91 will definitely resist detonation during the compression stroke better, as you expressed. Otherwise, I entirely agree with you.
Y’all should actually do data logging to test octane rating effects on your vehicles. Pull the data directly from the ECU, ECM, or DME. Get details like IAT’s, Ignition timing per cylinder, EGT’s, etc.. There also should have been some forced induction vehicles used in these tests.
There is a difference between recommended and required. My 2016 WRX recommended premium. Which means I can get away with lower octane for regular daily driving. I upgraded to a 2019 WRX STI and it says premium required. The same owner's manual is used for both cars. The language used in the manual is clear about what fuel needs to be used.
Premium gas is about keeping your engine clean in the long run. 👌 My 2009 chevy traverse uses regular but was performing horrible with BP and Speedway 87. Switched to shell 93 and now runs better with no more engine codes.
Higher compression motors, such as in turbo charged sports cars, should use higher octane. Also, sport motorcycles often have 11-13:1 compression and should use high octane fuel. If you use low octane on such motors you could experience detonation or "knock," and eventual engine failure.
My car takes premium gas, I experimented with putting in a lower grade gas, and I actually felt a significant decrease in power as well as a louder engine. Gas mileage was slightly less than with premium. My take is it honestly depends on the car because my brothers Hyundai turbo says it needs premium but he's been putting in regular for the 5 years he's had it now and nothing has changed, performance, loudness and mileage all stayed the same
I haven't noticed any difference in my performance as a runner - as I have been eating the EXACT same foods - for the past 5 years .... ( why would I expect a change? ) ... but yet - why does it sound silly when I say it - but NOT - when you state. ... ( haven't noticed any difference in performance since ( he has not ) changed any type of fuel he has been using in his car - since he first got it )
@@tsvandyke you’re comparing biology and machine? Um .. every car and human body requires different things. People change their diets and their cars. Especially the human body changes with time so many make adjustments. It’s your subjective opinion what works for you as it is for anyone else. It’s a terrible argument that you’re comparing your damn diet to fuel intake lol
I did the same and noticed similar. I had an older but decent car, I remember experimenting and seeing no difference. Then I got a different car, did regular for years until price kept going up and I was driving more. Someone mentioned premium helps mileage and I started it. Next thing I knew, I was filling up half the time.. my cars mileage isn’t great but that did help. I also feel city traffic vs. highway traffic makes a difference. Some are very passionate over this and from what most mechanics say, it doesn’t do the harm people say it does. I don’t think it’s worth people screaming over what they feel is better for the engine when people who have spent decades in shops stand by that unless you’re driving a nicer model, it won’t harm the car.
Unless you're testing your truck with professional equipment in a controlled setting, the improvements you think you're seeing are just placebo effects. You can disregard my entire comment if you have a F150 with one of their Ecoboost motors.
Darn it, I can FEEL the extra power when I accelerate on premium. Engine does not need to revv high when I am passing someone on the interstate. So yes, I like premium and I will keep using premium.
Donald Sanchez in the UK our standard fuel is 95oct our premium is 99, I ride bikes I noticed a difference between the 2 it was very slight though just me though
I did a test of premium vs regular to see if I got better mileage with premium. I got better mileage with premium. I recorded how many miles I got for six tank-fulls of each type of gas. The premium gas gave me 107 percent of the mileage I got with the regular gas.
I noticed a big difference with fuel consumption when I tried both 87 and 89 octane on a new Toyota Corolla I rented recently while exploring different places in BC. With the regular 87 octane gas, my fuel tank went from full to empty really fast unlike with 89 octane which lasted a lot longer.
+Alan Fox scientists found out that octane ( 8 carbons chain) has the highest compression pressure before it spontaneously ignite; as the result, car with smaller chamber volume can get the same power as bigger engine if the smaller engine has a higher compression pressure. So if the engine ( normal in high performance car such as infinity, lexus, bmw.....) has high compression ratio, it needs high octane gas to prevent premature ignition. Putting high octan gas in a regular engine , let's say a chevy cruze in this video, will not do anything. However, if you put a lower octane gas in high performance engine will cause pre-mature ignition and causes knocking. do some research about it and you will see.
Surprise - the 1.4L Turbo in the Cruze actually DOES see a gas mileage increase when operating in the hot summer months where heat can cause knock to occur, meaning an occasional premium top-up isn't a bad idea.
Cruzes (turbo) run better on premium and also has a popular tune that requires it. So yeah, the cruze I used to own is the only vehicle I ever regularly bought premium for.
Higher octane gasoline is only beneficial if you have a high-compression engine. For example, American muscle cars from the 1960s and early 1970s usually had a 10:1 or higher compression ratio. When the "smog era" started in about 1972, the compression ratios of engines dropped down to about 8:1, and run fine on regular gas. These days the computerized engine management systems can adjust the timing on the fly even on high-compression engines so that you don't get "pinging" (detonation) with regular gas, but you'll also get reduced performance, because the altered timing isn't ideal for best performance. The only thing the octane rating indicates is how resistant the gasoline is to compression-induced detonation, i.e., higher octane gasoline can be compressed more before spontaneously igniting. You want the spark from your spark plugs to ignite the gasoline/air mixture, not the compression. If it's being ignited by compression then it's happening prematurely, which reduces performance, can cause damage over time, and makes a "pinging" sound.
If your compression is that high and your timing is so far advanced 91 octane will not cut it, you need aviation gas, have fun at the pump at your airport.
MaximRecoil, I could not agree more. I have three new vehicles, all with recommendations for 91 or higher octane. Two run just fine on regular gas but one, a Lincoln Navigator runs sluggish and gets worse gas mileage on regular. Of course it also depends on where you get your gas. But, I have a 1969 Pontiac Bonneville convertible with a 428 cubic inch 4-barrel which doesn't self-tune and it knocks and pings like crazy on regular and takes a couple of tanks of premium to get it to stop.
I have a 2015 Honda civic and switched to premium and found I also get better mileage between 5% and 8% depending on the type of drives I make. It not a huge difference but it means I dont have to wait in line at the pump as often. Same result with my Lexus RX 300
The problem with this video is the type of vehicle they are testing. I can tell right away in the performance of my Audi, Porsche or Toyota when I put the cheaper gas. It is sluggish, shakes and knocks. If the vehicle does not require 91 gas than you will not see a difference, however if the vehicle requires it; that is a different story.
+rocker85675 not true. With my old accord premium made a difference in performance and fuel efficiency. I track my fuel usage with fuelley. The required fuel from Honda was 86.
They should not have used the chevy cruze it has flex fuel IE: the onboard computer actually adjusts the injectors depending on what type of fuel is being used.
Yeah, those cars are higher compression. They need it or the fuel will ignite before TDC. Also, Flex Fuel won't make a difference. ANY car will efficiently run gas with a higher than recommended octane rating.
I would not put lower octane gas then what the manufacturer recommends however I agree that adding higher octane to a car that doesn't need it won't make much of a difference at all
Why does the “expert” say there is no reason to use premium. Then 4 seconds later says “if I were to take my car to the race track I would use premium” there has to be some type of benefit then??
Some cars ''recommend'' premium fuel for the best blend of performance/fuel efficiency but you can use regular fuel. The engine will adapt to the regular fuel, but you will get less performance/fuel economy. A car the ''requires'' premium fuel must use high octane. Should one use regular fuel in a car that requires premium, the engine can/may suffer costly repairs. What Mark is saying for his Corvette, is he uses regular gas for day to day driving, but would put premium is he took his car to a race track. Hope this helps.
Tell me something: before posting this video, why did no one notice that your on-screen logo is blocking the display at 7:13, and simply move it or remove it temporarily?
They also leave out the fact that simply switching the gas and running the test isn't enough. The computer doesn't just automatically adjust to the premium gas.
I would be interested to know how ethanol containing gasoline effects mileage and power. In the USA, most fuels contain a percentage of ethanol, which is known to be destructive to rubbers and other materials, and causes fuels to be hygroscopic (absorb moisture), which personally has caused the steel uncoated interior of my ZX-1100 motorcycle to corrode. The only fuel NOT containing ethanol are certain advertised premium grades, which I only run to avoid the ethanol. Marketplace: please investigate ethanol in fuel. BTW, as others have mentioned, asking almost high school graduate fuel attendants their opinion is poor form since they are hardly credentialed experts.
1. Old high performance motors (1970s and older)require high octane gas. 2. New high performance motors if driven to peak performance require high octane gas otherwise regular is fine 3. 99% of new motors will / cannot benefit from premium gas. 4. High Octane requirements for " high performance" motors under maximum load drop as elevation above sea level increases. In other words, you don't need high octane premium at high elevations for any motor. At sea level, high performance motors under maximum load will/ may benefit from high octane fuel. 5. In general, high octane/ premium fuel is a waste of your money unless you race cars at sea level or have an old muscle car. The thing they should focus on is ethanol blended gas. That is the real crime in my opinion. Shell " V power 91 octane " just so happens to be the only fuel where I live and for that reason alone, it is my fuel of choice. Ethanol damages motors..period. It is much less stable than pure gasoline and breaks down quickly and gums up your motor. Ethanol attracts water from the atmosphere and will literally rust the internal components of motors. Small motors such as boat motors, lawn mowers are especially prone due to the fact that they are either near water or the fuel sits in them for too long with an unsealed fuel cap.
Charley Bomps Hi Charley! I'm not sure where you live but here in Edmonton, Shell claims that 91 octane V Power is Ethanol free. It states this on the pump as well. There is a way to test the % content of ethanol but I have not done it. This test can be found on u tube. In Canada, ethanol free gasoline products are not a constant. For example, in British Columbia, the only ethanol free gasoline is Chevron's 94 octane although many of the Chevron stations there don't even carry it. It all depends on where the fuel is distilled and blended with ethanol and additives. In Alberta, our fuel is distilled here in our province. In BC, their fuel is from Washington State ( I believe). There is legislation in Canada stating that 90 or 95% of all fuel sold must be ethanol blended. Gas companies are not regulated as to where the Ethanol free gas is sold or which of their fuel products will be free of it. It is up to the fuel companies digression. It varies from province to province and even city to city. From my investigations, Calgary has many stations that sell ethanol free gasoline( a disproportionate amount), meaning that other cities have to take up the slack. I suspect this is due to the fact that Calgary is the " command Center" for fuel companies in Alberta and they are hogging all the good stuff. I am not aware of US regulations, but I would suspect they are similar. It is up to the consumer to determine which products are ethanol free in their area. As the video indicates, the guy at the pump rarely know anything. You are better off asking the fuel truck driver who delivers the product. Simply put, it isn't easy to find out. Ethanol has high octane qualities, burns cleaner but has less energy available per unit volume than gasoline. It gums up quickly and attracts water. My question is, how much fuel ( energy) is wasted in the production and refinement of corn products. Corn strips the ground of nutrients more than any other plant and depletes potential food sources for humans which in turn drives up the cost of food. I can go into the relationship between corn/ ethanol producers and law makers but that is another topic altogether. In my opinion, it is a crime and a farse and bad for our engines, wallets and environment. If fuel companies really want to save the environment, perhaps they should release many of the engine development patents that they bought up that greatly increases the fuel economy of combustion engines. Of course , they don't do this because that would be taking "our" money out of their pockets. Enough said. My rant is over.
+Tuhopolttaja haha, don't show your ignorance here, it just because the remaining gas in the filter and pipeline run the gas engine for a while. The ignition temperatures of diesel and gasoline are different! Diesel even can not burn in gas engine, how it run the engine?
Recommended gas type varies. The only difference between the gas types is how much compression is required before they detonate. For example, diesel is an extremely low octane fuel. Diesel engines do not need spark plugs to have combustion take place, instead they rely on the compression of the fuel to bring temperatures up in the cylinder to detonate it. Gasoline engines have much higher octane fuel and rely on spark plugs to combust the fuel instead of compression. Some cars have a problem with knocking in their engine when using low octane fuel. Knocking is when the cylinder's fuel combusts because of compression when it is supposed to use a spark. Higher octane fuels prevent knocking by making the fuel harder to combust solely because of compression.
I raced dirt bikes for years. 85cc 2 stroke, and 250cc 2 stroke. Never ran 87, (bad experience with it). But mostly 93 and on race day 105 i believe it was. Anyway, you could really tell the difference. lil more pep out of the good stuff, and smells better :)
This is also why some road racing 2 strokes (the higher compression ones) run on avgas (aeroplane petrol) available from your local airport. They simply won't run on low octane, if you do you could hole the piston.
I used to keep close tabs on these numbers in my vehicle. After substantial records. I determined that using premium compared to regular got me an extra 20 to 30 miles per tank. Since I don't like going to the gas station, I opted to pay the extra few dollars a tank to get that extra 20 to 30 miles. I trade the extra few dollars for my time. I always reset my trip odometer at the filling station, and keep an eye on my consumption. I don't keep records anymore, but I notice the difference in mileage per tank. This video did not change my mind. Using premium still gets me more miles between fill-ups.
I drive an 07 prius with 300K miles on it. I have run regular most times just due to cost, but I run premium as well. The premium does get me more miles and less pinging on hills. What REALLY works well is the ethanol free premium gas, that stuff really helps, if I could afford it (nowadays) I would run it all the time. So my inputs is this, premium is better (ethanol free is best) than regular, thats my experience.
That test doesn’t do anything it’s gonna require the same amount of force to turn the wheels no matter what gas you put in it. If they’d ran the test till it was empty with both and then compared the time it would be legit
octane level is a rating given to fuels for their ignition temperature. a fuel with a lower ignition temperature will be given a lower rating. high temperature race engines or performance turbo applications produce a lot of horsepower or heat. Having a fuel that ignites at a lower temperature could be dangerous in those kind of environments. Because it might not burn when the spark plug ignites but maybe when the intake valve is still open (causing damage). but in normal naturally aspirated commuter cars, 87 or lower is A OK. :D side note. putting a higher octane fuel in a car that recommends 87 could cause the engine to over work the ignition system trying to burn gas that takes a higher tamp to burn, causing sub optimal performance or degradation to the ignition system components. during these changes the engine could run rich or miss fire all together. (in extreme theoretical cases.)
+Tony Samson The only relation I can think of is two things. E85 burns cooler which I don't think he knows and higher cylinder pressure can create hotter temps. Never have I heard this one before though.
z lariviere20 YOU have owned. It's different for people all around the world that can only afford mid sized sedans and smaller cars with not much power! It's just like I'm saying "20% of the world speaks Chinese" and you're saying "90% of Americans speak English"
yes i did say "i have owned" so i did make that clear so why are you pointing out the obvious. i simply made a meaningless comment about my personal experience with cars i have owned and nothing else so your response really makes no sense without injecting words into my comment that simply aren;t there or even implied
Remember, higher milage cars have carbon build up and thus this takes space in the combustion chamber and will increase compression. Higher compression will pre-ignite producing knocking/pinging in the engine. I've had plenty of older cars that recommended 87 octane, but would knock without 93 octane.
@@drapermike a car built after 1996 can adjust for whatever type of fuel you put in. Older cars don't have advanced enough fuel injection system to compensate for the lower quality fuel.
Cars before 1996 can't compensate, modern cars(besides direct inject) don't carbon up like they used to. If it's an older car, yes use premium, new car, put whatever in it, won't matter
The best thing to do is get the ethanol out of gasoline, yes I know the farmers who get subsidies from the government are going to hate me but your wallet and engine will be lot happier with better performance.
Agreed hell i believe non ethanol get Better mpg tham ethanol gas.. plus ethanol does not have long shelf life. Then when u have it sit in a tank of a car not driven regularly it will leave moisture in tank.Ever look in a tank that has sit with ethanol in it for a long periods..omg
@@brianwinter1453 Absolutely correct! Ethanol blended gasoline can undergo phase separation if it sits for too long, resulting in a fuel that is lower in octane than originally blended. Enough of the enviro hippies and enviro police!
If they are going to do proper research they need to use an older vehicle that may be dirty from wear and compare premium versus regular and see if the results are still the same. Doing this on a new vehicle is worthless information.
I have a 94 and 96 model vehicles (Ford, Mazda) with over 200K miles - always ran regular, gas, did reasonable oil changes, occasional fuel additives at about 50-100K (WTF) - stared using mainly Marvel Mystery Oil (gas and oil) - engines run like new and pass damn state emission tests no problem. Did a few self tune-ups, can't remember ever changing the fuel filters, but think I have. That's "proper research" enough for me. And best yet, the vehicles were paid for since before 2000!
I always ran regular gas in my 2001 s10 4.3 till I hit around the 150k mark. It was starting to run a bit off. Ive always done regular maintenance myself. Ran premium and noticed it performed much better, slightly better fuel economy. Did that for another 30k, then replaced the Spider injectors on it last month. Im back to running regular and everything is like brand new. I suspect premium gas helps some on really dirty injectors. Im lucky, I live in a state where they dont do vehicle inspections anymore, cause I have ripped out the secondary smog pump that was causing all kind of headache on the 4.3 engine. Im positive I would not pass inspection but she runs just as good as she did when I bought her new. Also, I do notice a difference running chevron or shell brand gas as opposed to generic gas stations. Dont know if the generic water down there gas or if the so called "detergents do anything, or if its just psychological. Probably a bit of both, lol.
My manual tells me to fart in my gas tank and I've notice my mileage has improve. But it also depends on what u eat. Sushi = 87oct fast foods = 89oct Mexican foods = 91oct.
Always use regular for my Sonata. However....my small engine machines - lawnmower, snow blower & power washer are harder to start when using regular over higher octane fuel. I agree the regular fuel works well & saves a bundle of $$$.
It's the CBC, take everything they say with a grain of salt. My wife drives a Cadillac SRX. Only takes 91 or higher octane. Anything lower and the check engine comes on...
Jim Bob you say that but I have seen different. Might have been because it was a lower compression engine, but it happened in that car, counterintuitive as it sounds
Premium has a higher "detonation" point !! Reduces the chance of what is called "knock". Check your manuals for what the car maker says !! Premium is best & or a must in high performance & turbo cars !!
In my opinion, most car owner's manuals will have the gas type and octane level listed. Just use the octane recommended by the manufacturer. They know best.
Octane is the flash point. Lower octane has a lower flash point. If you burn 87 in a high compression motor it will actually detonate earlier from the heat created during the compression stroke.
I've had my 2010 mercedes e 350 for 3 years the first 6 month's of ownership I used premium but then I started using regular till this day I've had zero problems outta my engine no knocks, no pings, nothing car drives fine with no problems if you clean your fuel system from time to time you won't get those problems period
If your car starts knocking and was build this century your car is defective and needs a new knock sensor. Your ecu will regulate the ignition to always stay below detonation limits. It will trade some power and efficienty in order to prevent engine damage, always. Any car will run perfectly on any fuel thats for sale. If higher octane gas is recomended in the mamual your car will only give listed maximum output with that fuel. But if you are just driving around town or on the highway you don't need the extra performance. Unless you are towing something or are a street racer you don't need the premium.
The first bit of reason I see. Apparently not many of the younger generation understand compression ratio and why the need for higher octane with higher compression. (PS also older American cars like my 62 Olds - 10.75:1)
Bluexf1r3 Europe and the United States use different Octane rating methods. According to Wikipedia, and some other sources I've found, 91 octane in the U.S. is equivalent to 95 in Europe.
It’s all depends on the motor and computer timing of the engine compression ratio. I have vehicles that stated premium only. As far as the detergents top tier fuel is gonna have higher fuel additives in it. All fuel stations are required by law to have a minimum amount of fuel additives by epa. But if you use a fuel station that isn’t top tier over time maybe like a month, year or several years fuel parts will build up deposits in time. Most of us don’t keep cars long enough for that.
