Mazda 2.5 Skyactiv-G Engine: Specs, Reliability and Maintanance Tips 

Honestly I’ve never had any problems with any of the 5 Mazdas I’ve owned in the past. I’m considering coming back.

326,000 kms on our 2018 Mazda 3 GT and no problems at all. Super reliable !!!

140k miles and I have had not a single problem.

Just turned 430,000 miles today in my 2015 Mazda 6 with this engine

I'm the 2nd owner of a 14 Mazda3 SGT (2.5l Skyactiv). I've had it since 22k miles and it's about to tick at 150k miles in a week or so. July will make my 7th year of ownership. I've replaced the belt tensioner twice in that time and replaced the water pump. The pump was leaking per dealership inspection, however, I never noticed a leak or any anomalies with fluid levels, and that was done at about 55k miles, but was covered under CPO warranty. Oil change intervals have been 7500 miles. I've done transmission fluid exchange twice. The car has never left me stranded and currently averages 31 to 37 mpgs. I've been keeping records since 2017. Lowest overall lifetime mpg for one tank, 17.9 mpg (pandemic - city setting), highest mpg which most recently beat its record (37.5) is 38.0 mpg. I live in rural area and most trips are 20 - 65 miles one way.

Change this Engine oil every 5000 miles if You don't drive much or do a lot of short drives say under 5 miles etc, You'll Thank me later, 12,000 oil changes are absolutely STUPID unless of course you do it all in None Stop driving then maybe but I wouldn't even with the best oil possible.

170k miles on ours and pretty much been only oil changes every 5k miles and other routine maintenance.

I had a 2014 Mazda6. It was bulletproof

I have 4 Mazda's with this great engine!

I have a ‘16 Cx-5. No issues at all. Fuel economy is not great, I check it at every fill up and it’s 9-10 gallons for 250 miles ( 24-28 mpgs). If I do a 100% highway trip I’ll get 30!

I hv that in my cx5. Brilliant power. Bulletproof. All time classic

100% PR! I have a Mazda 6 2.5l with 194HP. You can drive it easily with 12l/100km. Also 7.5l are possible. 8.5-9.5l are normal. My 2006 Toyota Avensis 2.4l with 163 HP before used the same if not a bit less.

2015 Mazda 3, with 340,000km mileage. Engine, transmission, AC compressor, alternator still in good and dont have any problem.

Are used to have a Mazda three 2014 I had 165,000 miles on the car before I traded in the problem was the transmission was slipping. I ran synthetic oil in it from the beginning never had one engine problem its transmissions I wonder about of course that was one Ford on them. Now I have a Kia forte turbo, and I just had to have the fuel injectors rebuilt. I’ve had more issues with Kia than I’ve had with the Mazda, but I will definitely buy a Mazda in the future.

I have a 2014 Mazda 6 bought new in 2013...140k miles and nary a problem. This is my 3rd Mazda, going back to a first gen RX-7 bought new in 1979. I have 500k miles on three Mazdas with basically zero forced maintenance beyond a failed A/C compressor on a 2005 3 hatchback. Just ordered a 2014 CX-50 turbo model. Just be sure to keep up with basic maintenance (oil, plugs, tires, brakes) and you'll get many years out of them. I never get the extended warranty, but might consider one this time since the engine will have a turbo.

I have a 2021 CX-30 non-turbo AWD 2.5 Skyactive-G. I change the oil with proper full synthetic and filter every 6000 miles, have it done by a dealer, check the oil frequently and no problems at 38,000 miles. It has been across the USA from zero to 12,000 feet, in temps from well below freezing to 103 F. I also changed the engine air and cabin filter at about 25,000. Local fuel mileage is abut 24 MPG, top highway at moderate speeds at about 29-30.

I have a Mazda 6 2015 , and it burns more oil and drive rough on low octane gas .When I found this out . I started using 93 octane and the problem went away . I have been using only 93 octane for the last 8 yrs , and it drives and zooms like a new car .

I got 175k miles on my 2018 Mazda3 2.5 in Los Angeles driving conditions I changed the oil every 3k I don't run on old oil ever. She should get me to 200k with ease.

My 2015 Mazda3 Skyactiv engine got 360,000 or 580,000 Km without any problems. I do my own maintenance and oil change every 5,000 miles and 30,000 miles trans. oil drain and fill. I did induction cleaning at 180,000 Miles and the valves weren't too dirty. I would buy another Mazda with SkyActiv engine again.

I own a 2014 Mazda6, a 2005 and a 2008 Mazda 6, and a 2010 Mazda 3. All of them have over 100,000 miles, the 3 has 212,000 miles. Never a problem with a timing chain. never a problem with Fuel injectors. Never a problem with fuel pumps. I keep them all running myself. Just your standard and completely understandable tune up and wear and tear repairs are all I've ever had to do. Great, great cars.

I’m debating more and more to get this with a six speed manual

95,000 kms on our 2018 Mazda 3 (SP25) no problems what so ever, since the car was new i always use higher octane good quality fuel (98 Octane) I change the oil every 8,000 kms i always use good quality 100% synthetic oil and filter.

What year is your Mazda?

I have a 2015 Cx-5 Touring with 105k miles I'm 2nd owner and it's been good but recently it has a lil shake on idle but has new spark plugs, I only use Premium fuel and all Fluid Maintenances have been done. Sometimes feels slugish on acceleration like it doesn't want to barley move and also transmission sometimes has some rough shifting.

Does this apply to Mazda’s turbo charged 2.5 engines as well?

The best engine.

Thanks for the info on mazda cx5 skyactiv G can you give me info on toyota rav4 2.5 engine.

Yup, use top tier gas only from stations that have the top tier logo. E.g. Shell.

Number #1 problem we have in Australia is the water outlet flange breaking o ring failure , causing loss of water and over heat .

I've had the oil light indicator go on after an oil change and disappeared from another half-court added and is fine until the next Oil Change I don't think their capacity is right

Have you guys had your cx5's engine opened up every 50k as said in the video?

Mine has misfires or rpm stuttering when starting up. Mine also gets extremely poor in gas mpg. I have 2023 Mazda cx50 and it’s my first Mazda. Not thrilled by this suv performance.

أحسنت

Don't be confused as it's not really a 14 to 1 compression ratio, it's a 14 to 1 power ratio. This engine uses Miller cycle operation which holds the intake valve open longer to push some of the intake air back out on the compression stroke. The effective compression ratio is closer to the 8-10 to 1 needed avoid engine knock on low octane fuel to . The full 14 to 1 power ratio means more power is harvested on the power stroke with greater fuel economy resulting.

Coolant control valve is faulty up to nov.2020. A new one is expensive🤨

What type of fuel is best?

60K on a 2018, no problems. Average 33.7mpg

Love It No Turbo They Go Bad One More Thing To Fix Turbos Were Big In The Eighties Not Worth It Love The Reg 2.5 No Turbo Nothing For Me

413k miles and I’ve just had my first issue. I need to replace a catalytic converter. I’ll take that at 413k miles.

Anyone with GDI have carbon build up?

Own 2016 2litre cx3 229k I have misfire which I believe injector😢

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What is poor quality gasoline, like too low octane level or what?

There is a reason why other manufacturers don’t go that high on compression ratio. Another similar example, BMW make their engines run too lean and their engines are currently suffering heat issues.

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Dumb video. These engines are pretty much bullet proof with basic maintenance.

Expect the BELT TENTIONER to take a dump at 50K miles on sky active engines, mine(2023 CX-50) just took a dump and it cost 583.00 dollars to replace, Mazda is aware of the shitty belt tensioners and has done nothing about it...

If you do your maintenance as required even the shittiest cars will last you for decades. If you do not, even the most expensive cars will die prematurely. I thought this was common knowledge.

if a 4 cylinder, not interested

Too bad they burn oil and need ring replacements

I think it is crap 💩

Literally know one has had these issues not saying they can’t and won’t happened but to those who made the video your talking to a group of people who have had these cars for years