Do Fuel Saving Gadgets Actually Work? - Fifth Gear 

Want to save fuel? Minimize the use of your brakes and keep your speed steady. It's as simple as that.

That you very much, I almost purchase one of these devices but after looking at you test I am convinced they are all junk. We need more people like you to make awareness to these scammers. Thanks again.

Sold my car. Most gas efficient move i have ever did.

A lot of these statements were about three years ago. However, I just heard about this product. Evidently, there starting another push to try and con more unsuspecting consumers. This why I love watching informative shows like yours. Excellent video, thank you for sharing.

The most efficient,, least costly and easy to use fuel saver is the driver and how s/he operates the vehicle.

Thanks for doing this! and for making it quick and entertaining

That was probably the best most straightforward honest video I've seen in a while Good job you didn't Hedge around you tested it and told us the results

Great video; thanks for posting. I would have like to have seen another baseline, after the tests, to see it it was still 49.

"That is just a green light"

The best fuel saving device I know (and it's the best by far) is a light right foot. I could get over 51mpg out of a bone stock 1.3-litre Honda Jazz (manual transmission) using that.

Thank you. Your research is greatly appreciated.

OMG, my stupid family member just bought freaking 4 Minicon, it work by plugging to your car socket and will save 30% of fuel economy. I say it was 🐂💩, 1 minicon cost 1 Million Indonesia Rupiah (65 USD). The name apply by itself, mini-CON.

Thanks for the tests and video. Well done!

If the Viabtor thing was "just a green light", why did it worsen the fuel consumption by around 2mpg ? They should have tested the car again with no add-ons to be sure there wasn't a drift etc.

Great video! Informative, entertaining, concise. We’ll done!

Want higher MPG in your car(s)? Use COMMON SENSE. Use Synthetic Oils in your Crankcase. Amsoil is the best and only choice. Keep your tires at 35 psi. Use your car's ECO button (if you have one) all the time. The ECO (Economy) button in newer cars gets you about 3-5 MPG highway mileage. Don't speed uphill, but coast downhill. Use your Cruise Control all the time on highways and in the city. Using these methods, I got 81 MPG on the Highway in my Honda Civic VX, and 48 MPG with my Civic EX. Every single one (5 of them) of the so-called "Gas Saving" Devices that I have ever used in the last 40 years of driving HAS NEVER WORKED. Save your money, and don't buy them.

"in it's defence the makers claim you need to cover 2000 miles before seeing any benefit". um i'm pretty sure that's just to stop people returning this shit after they realize they've been had. not to mention any device that intercepts the fuel before it hits the engine would have immediate effect, you know, considering any fuel that goes in is gone forever.

What I take away from this is that it appears the vehicle used in the testing gets worse mpg as it warmed up, then slightly balanced out at the end…..

The best thing that I did to save fuel was to fit two electric de misters on the dash beats wasting fuel waiting for the engine to heat up. demisting with the heater is counter productive as it removes the heat from the engine that you are trying to warm up to its most efficient operating temperature. The two fans also come in useful for extra air flow in hot weather.

Thank you very much!!! Great job and very helpful.

My experience- I had a 1972 Ford Escort Mk 1 which failed the mot on emissions when testing first came out. I put a Broquet type unit on and took it back and they asked what i had done as the car now passed. I explained. They were amazed. I had this car for a few more years and it ran better and better even using the now only unleaded petrol. I dont have the car now but it is still on the road. When others were getting hardened valves fitted etc, i used this. Yes- it was developed during ww2 to run Rolls Royce engines on aeroplanes using inferior Russian fuel. It worked then and it works now. The unit has magnets and tin which is what works on the old engines to replace lead.. I also used one on a Reliant regal with the same effects. The old time Classic car guys now about these. The other products i cant speak for but they do seem dubious to say the least. New cars- well you cant improve on them much to be honest .

Thanks for sharing that. Really clear.

Save yourself 6 minutes and 40 odd seconds… No. They are designed to get you to part with money.

I use broquet more than 10 years very happy my car save fuel and very smooth engine....cannot dyno 1 time and claim the product is useless but need to run for long time to get the benefit...

I was about to buy two of these on Ebay. The blue light in the cigarette lighter or the magnet. You saved me trouble and aggravation. I'm even surprised these gadgets were years old. Guess nothing beats just getting regular oil changes and keeping your car serviced, and using good gas.

I did a simple Google search after seeing one of these devices advertised on youtube. Ironically enough Google suggested this video on youtube. These devices are pretty much what i expected. A scam.

Given the different fuel figures I would guess that there many contributing variables that may have something to do with the variance. Even so, a base line test after each gadget test, would have been a good thing. Good trial

Just wanted to buy one of these but I decided to make findings and this is the result. Thank you.

“It is... just a green light. That’s all there is to it”

One of the best ways to improve everyone's mpg is to use your indicators to keep traffic flowing

Idk about other device but i know a thing or two about that broquet device. It is not for fuel saving BUT it gives your car the ability to use lower octane rating fuel than the book recommend. It's useless in developed country cause there's a lot of fuel option around the country but not in developing country

I didn’t expect any of these gizmos to improve fuel efficiency, but it surprises me that the mpg with the gadgets on was actually slightly worse than without them. It seems the mpg should be the same, since the add-ons aren’t doing anything. Maybe the differences are within the statistical margin of error?

Thank you. Very clear

Great Test. Could you test Xtreme Fuel Treatment (XFT) of Syntek Global. Kindlygive us feedback on it. Thanks

Useful informaton thankyou

The first text you got 49. No one's setting in the car. All the other text still 2 people in the car. So yes you will got less gas MPH.

I can get 75+mpg from my car (1.6 diesel) on a long journey just by driving smoothly (not necessarily slowly)

My Head Has Just Fell Off.

the Viabtor sounds some sorta sex toy

Myth buster myths…. Conclusions drawn before results on the magnets. The test done on the fuel magnet was not done as directed by the manufacturer. When I first purchased a fuel magnet, the mpg went down slightly and then increased. My instructions mentioned 200-500 miles. That’s what happened in my case and has on 6 different vehicles. Guess you’ve got enough patience or willing to follow the instructions.

Thank you for letting us know.

what about the 'fuelsavepro'. I saw an ad for it on youtube. I imagine it doesn't work, but the advert was pretty good! haha. Surely you need to do something to the ecu to change things like fuel consumption though, but prob different per car / model and would affect performance

Best fuel saving device out there, it's called a bicycle

I have one fuel saving tip. Drive carefully and avoid high speeds, hard acceleration and breaking. This will save fuel

Any chance you can do an updated check on the “Eco” fuel savers. There is EcoTune, Eco-dbo2?, EcoChip, EcoMode or other.

Thank you Sir!!

The owners of the companies selling these gadgets should be arrested.

More to the point, where did Johnny get that Evel Knieval shirt?

Don't rev hard.don't brake hard.

my theory is control temperature of air intake and then you save 50%in the coldest winter in canada, summer save 25 in the warming up period when you drive only short distance

Love the Evil Kenevil Shirt!!!!

Where did you purchase these products from?

How come the baseline was 49 and most of the others were about 47?

How about low rolling resistance tires and light weight rims with a cold air intake that runs the engine air through a heat exchanger that cools the air using evaporating liquid nitrogen?

Is amazing how many people fall for this crap!!!

A fuel saving device: Bicycle...

You know you're getting the straight scoop when your engineer is named Gareth.

Test with pure acetone in the tank. Don't use hardware quality and add about four ounces per tankful. I've had some success depending on brand of gas.

HI. Have you ever test the Greentech fuel saver from Moletech, a company from Taiwan?

Hi great video! Have you covered hydrogen fuel cell kits? The ones that produce hydrogen on demand rather than being stored in a cylinder?

“It’s just a green light…” 😂😂😂

Hey I would like you to try fuel Maximizer from optec and performed this test

Hope you'll have a testing with growing business "HHO". On conputerized engine. Thank you in advance. They claim to explain the additional combustion by popping the bubble from HHO generator but I can't see any scientific approach to prove they are worth

those work really great in tesla’s, you never have to fill up gas in it anymore

You should try the homemade hho system

While I didn't invent the wallet, I have found that is does save me a ton of fuel when it has no money in it.

Your car is already as fuel efficient as can be at the time of when it was developed with the latest technology. None of these gadgets will do anything to it and might, instead, ruin your mileage. They're nothing more than placebo. The best way to get the best mpg out of your car is to be smoother on braking and accelerating and instead of stopping at a red light, let off the gas way before you get to it and coast through when the light turns green just in time.

Hey!! Have you done one on B Eco???

Keep your tyres at the correct pressure, don't carry extra weight such as parcel shelf, drive steady in correct gear, have oil at correct level and clean air filter, don't use radio and heater if you don't need it, keep windows closed.

The numbers kept dropping from baseline did you give the engine and tires time to cool?

How about those air flow stationary intake fan whirlpool devices or flex fuel modification kit ,if more spark needed just jump sparkplug with capacitor ?

Already doing quite well at 47mpg.. I haven't ever owned a car that got that kind of gas mileage. Even my small compact Ford Fiesta only gets at best 32mpg on the highway.

I wanna know that does the quantum energy fuel saver really works? Cus its supply is becoming enormous in my country.

the only fuel savings you'll get is by how you operate your car or you reduce your engine displacement by doing cylinder deactivation in which GM does so anyway. (though cylinder deactivation is proven to be only a temp solution and is not recommended because of ghost problems associated with it)

I have just built a fuel saving device that works. I put a bar out the front of my car with a hook that grabs onto the back of semi trailers. I just put it on youtube. It is titled Semi trailer fuel saving invention

Funny that they have an Indian expert examining the gadgets.

Hi could you try supertech euro fuel saver?

Put a hollow metal ball between carb and intake manifold, atomizes and vaporizes gas doubles gas mileage and cleans up emissions this is possibly how Poque did it please try this it works I know I made one for a 85 chevy truck one for 65 dodge truck one for a 74 honda cb360 .look under ( motorcycle hollow ball gasoline vaporizer)

If u wanna save fuel judt buy a standalone ECU and get your car tuned. Re doing the fuel mapping I've seen a few customers come to our buddys shop just for this on a civic SI. They managed to make it hold another 50 kms to a full tank

In a real scientific test, they should have re-done the baseline test at the end, to proove their results, as the other devices may have worked worse, due to a higher intake temperature, as the whole system warms up pretty much after several runs, with only a fan cooling the system

I LIKE YOUR SHIRT!!!

Can you test the odb gadget as well pls. Thanks

Should have ran a baseline at the end. Made sure still 49. Nice video though. Gadget man groove does work. My 99 Ford 4.6 4x4 gets 22 mpg highway 17 city. But it’s not cheap. Custom made from new part. U can google it

Don't think those devices will do anything but..... how a green led connected to the carplug can decrease the mpg? It won't make any better but how does it make any worse?

Finally, mystery solved!🤘🤘

My best fuel-saver was a Kia Niro Hybrid, nothing to charge, almost 1000 km for a tank, quiet refined motoring, what a difference from the old and lovely Skoda... 520 km per refuel (same cost)

Thank you for saving people from these scammers. Why isn’t the authorities arresting these people for fraud?

when they say, - buy it before it's banned, all bells should ring......

Can you test HHO generator which is added to petrol or diesel engine. So generated hydrogen is used as an additive to existing fuel system, not as a replacement as they did in MythBusters and proved it wrong.

What about throttle controllers? Anybody have any experience?

I want that shirt where did you get it ???

What about voltage stabilizer?? capacitor??

I was wondering if you all could test the hydrogen generator and see if that gives you better horsepower, cleaner admissions and better fuel mileage

There's a sucker born every minute. Con artists love you.

i think the baseline score is wrong as the parameters in the car's pre programmed ECU is constantly remapped for best driving experience... u cant loose MPG by plugging anything to the cigarette lighter or any electrical device... looks misleading

What about using a vapour system putting the lines directly into your airfilter

Just drive in the correct gear for the road conditions, in town, don’t race the adjacent car to the next set of traffic lights, which are nearly always on red when you get there, don’t carry loads of junk and heavy tools, tyre compressors etc.in the boot and only fill the tank to 50% to reduce the weight of your vehicle.

The catalyst one has come back in the form of FTC pellets, they're advertised in the Daily Mail apparently endorsed by Mike Brewer, i wonder if he knows it's a scam.

thanks for putting it out for us! I've just seen a "magnus kristof" ad about his amazing 2035 miles per tank. which it's a fake. otherwise it would be all over the news too

Have you tried racechip?