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

[@gsguji]

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

[@LxTxSURGE]

what maintenance has been done on your mazda?

[@gsguji]

@@LxTxSURGE Just regular maintenance, nothing out of the ordinary.

[@karentiger5117]

how did u get it that high on the odometer in 6 years😅😅

[@crxdelsolsir]

When an engine is 25 to 30 years old and people say that then I would belive it. At 6 years of age your engine is mainly highway. Highway miles are said to be 1/10 of city driving making it more 30k. It has less heat cycle, less age on seals, rubber bushings, starter starts, etc. I have a 92 Accord (362k), 92 Del Sol (305k), 88 Concert (156ķ), 91 Prelude (145k) all original engines and transmissions still factory sealed. Just regular services.

[@JohnT-j4e]

@@crxdelsolsir That's amazing. I am curious does any of your cars' engine burn oil or leak oil at the rear main seal? What is your oil change interval like? I have a 2001 Civic with 210k mile that leaks at the rear main seal but otherwise runs great. I change oil at 5k which is typically around 9 mos to a year. I have never own any car that doesn't leak at the rear main seal after 15-20 years is when they typically start. I was wondering if anyone have a solution to solving the rear main seal leaking at this 15-20 years mark.

[@patrickweston8743]

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

[@GodsmacK314]

Naturally aspired ?

[@patrickweston8743]

@@GodsmacK314 yes

[@jadengill9697]

138k and I have engine light for catalytic converter, and there is some noise in the front end, but that’s all.

[@greatdimitri1049]

108k '18 CX9 and no issues.

[@lukeparagas2056]

@@jadengill9697 is it a costly repair job?

[@chimaeraSPK]

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.

[@icecold8974]

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

[@sunleo9956]

will you choose the turbo or not?

[@icecold8974]

@@sunleo9956 probably not, I prefer N/A less issues with reliability.

[@scooterwoodley195]

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

[@CrimsonLegacy]

Wow! Congratulations!!

[@DespinoiuEduard]

@@CrimsonLegacy I do agree!

[@SethCX5]

that gives me hope, I'm at 246,000 on my 2014 Cx-5

[@charleshart5563]

Damn dude awesome

[@wiredawg2005]

AWESOME!!!

[@lorimeyers3839]

Bought a Mazda3 hatch brand new in 2016. 118,000 miles later and not a single issue with the engine. I did have the serpentine belt replaced at 100,000 miles. The other day my back passenger side shocks went. Aside from that, it’s been a fine car. As long as you get oil changes in a timely manner, I feel like my Mazda will run forever.

[@Corkfish1]

I had a 2014 Mazda6. It was bulletproof

[@planeguy95]

Quite literally?

[@CrimsonLegacy]

@@planeguy95 Helpful as a resident of St Louis

[@azhanmz6948]

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

[@ValleyProud916]

I have 4 Mazda's with this great engine!

[@planeguy95]

Why do you have 4 of the mothers?

[@johnpanagiotopoulos8539]

Cause they are so ucking,,,good 😊

[@Tommyinoz1971]

I got a Mazda 3 with the 2.5 Skyactive G engine only 2 weeks ago. So far no problems.

[@raymondreiff8170]

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.

[@ali3lia]

Here in Canada, the oil change minder pops up at 8000km/5000mi. I have a 2017 Mazda6. I think manufacturers are lying about long oil change intervals so it appears that the cars are lower maintenance and as long as they clear warranty and then some, they are ok. Modern engines work harder than engines of 10-20 years ago, unless oil technology is changing faster than engine technology, no point in extending oil changes. Plus they’re all going lighter weight oils and engines start burning them in a couple of thousand miles.

[@ali3lia]

Maintenance free transmissions are also a scam, I had to change my transmission oil at 40,000km as it was burnt.

[@jamescampolo7824]

@@ali3lia Long oil change intervals means more wear, planned obsolesence. They know the engine will last the 3 years until it's out of warranty, after that they don't care. They want you to get a new one.

[@Nordestada]

Absolutely right, Raymond. Every 5-6000 miles is recommended. I drive about/close to 500 miles a week and oil changes every 12k miles is ludicrous; check the oil at least once a month.

[@Nordestada]

@@ali3lia , you set your reminder at whatever mileage you want.

[@Giardintek]

Cm on folks, Don't let alarmists turn you away from Mazdas. I traded my Mazda-3 with over 200k on the odo for another car and would not hesitate to get another one. Both the 2L and the 2.5L Mazda engines are excellent and long lasting, given the fact, you maintain it properly and do not abuse the vehicle.

[@redrum3835]

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.

[@rrmorris67]

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.

[@pgilb70]

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

[@leonb2637]

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.

[@krzysztofczaplicki8707]

2016 mazda6 non turbo,110 k miles and not a sigle problem,all factory parts inc.battery. pushed hard.avg 34mph,at 65 stedy/cc, easy 40mpg

[@JS-qj2sg]

I need to know if mazda cx5 or cx50 2.5 turbo engine with a six speeds transmission is better than acura rdx 2.0 turbo engine with a ten speeds transmission comments please.

[@charlesbartholomew2910]

@@JS-qj2sg I've never had an Acura RDX 2.0 Turbo so I cannot speak to that. I do, however, really like my 2020 CX-5 2.5L Turbo Signature Model. It's a blast to drive and has been very reliable for me. I change my oil and filter every 2500 miles using full synthetic 5W-30.

[@JS-qj2sg]

@charlesbartholomew2910 thanks for asking.

[@nicholastedeschi2867]

How many quarts of oil do you use to change the oil?

[@timvivek7439]

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.

[@abrorr]

You don’t need to change transmission oil on Mazda Skyactive engines. They’re designed to last forever

[@peterscanlon9727]

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!

[@TheDude50447]

Thats normal for SUVs though. High weight and bad aerodynamics.

[@Heathsmusic1]

I get the same on my 21 Mazda 6. Not great but love the drive

[@markg999]

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

[@sailboatlighthouse]

Have you ever serviced the transmission?

[@markg999]

@@sailboatlighthouse Yea Ive done the transmission fluid every 30-50k miles do drain and replace which is like 3.5 quarts or so.

[@sailboatlighthouse]

@@markg999 thanks for your reply, the dealership service department said that Mazda prohibit them from touching the transmission, I have 65k trouble Free but Everytime I bring the issue up they you can create more trouble, that's why Mazda says no maintenance or change to the fluid it's a lifetime and you can cause damage, very confusing and concerning, I can't afford any new car for the foreseeable future and yet they won't service it, I contacted 3 different dealership.

[@Nordestada]

@@sailboatlighthouse For my 2016 Mazda6 with an automatic transmission, servicing the transmission is not recommended by the manufacturer. The dealership would not do it, so at 175000 miles I had it done at a shop. I drive spiritedly so wanted to have it done regardless. Never a problem but just as preventive maintenance.

[@shirtlessGraveler305]

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.

[@johnnymartin21]

I think from 2017 onwards Mazda stopped using transmissions made by a company owned by Hyundai/Kia… Scotty K mentioned it in one of his videos. They are also not using CVT’s so a huge improvement and also the choice of NOT choosing Turbo option on every model it produces.

[@Hutchy86]

What other issues have you had with your Forte?

[@millardc6768]

I have same problem with my 2016 mazda cx5 GT. The transmission slips going from Reverse to Drive

[@Mikey-jn3sq]

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 .

[@dsbennett]

Try X-Caps, a fuel catalyzer. It makes the fuel burn hotter and more completely inside the combustion chamber. This cleans your engine. This lowers the temperature of the catalytic combuster. It also raises the octane level so that you don't have to buy the expensive high octane gas. You can buy a trial size good for 5 gas tanks.

[@robertdevoy3119]

Using a top tier gas could be the solution without resorting to using premium. Top tier brands add their own superior additives to the standard additive that comes from the refinery. Look for a list of top tier gas providers on the internet. Very often it costs no more than no name fuels or only slightly more.

[@scooterwoodley195]

Same for me. 93 really helped. 430,000 miles and still going!

[@oceanlover3530]

Chevron with Techron! You don’t need to use premium and cars love it! ✌🏻✌🏻

[@photog1529]

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.

[@u.g.7162]

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.

[@TheDude50447]

I have a Mazda 3 with 186hp and my average according to the bordcomputer is 5.7. And I live in the middle of a city so its not just highway cruising.

[@HowardBurns-g2d]

Qqqq​@@TheDude50447

[@glennshewin9788]

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.

[@iongonzalez2601]

what brand of engine oil?

[@GoliathCarCulture]

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.

[@darylhoward2485]

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

[@FranciscoHernandez-dq7rf]

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

[@Vitaliy-zx1nz]

The best engine.

[@fredduerr2927]

No

[@dreadrechsler8278]

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.

[@deegan463]

It does not use the Miller Cycle. It uses variable valve timing to acheive, under certain conditions, the principles of the Atkinson cycle. The Miller Cycle, by definition, uses either a supercharger or turbocharger. But yes you're absolutely right that it's not 14:1 at all times.

[@vivienstaehle1326]

indeed, for compression test, mazda official note says the pressure measured when doing test would be arround 8 bars because the intake valves stays open even when piston goes up. 14:1 is the difference of volume between dead up and dead down

[@JS-qj2sg]

@deegan463 can you tell me your personal choice between mazda cx5 or cx50 turbo or non turbo compare to acura rdx turbo which is better 🤔

[@ali3lia]

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

[@andrewc4606]

Allmost ALL stations in the U.S. have top tier gasoline any more. That USED to be an issue decades ago, but not any more.

[@ali3lia]

@@andrewc4606 I am in Canada, eh.

[@user-bq2co6lh3x]

@@ali3liawhat top tier gas has that lower tier gas dont. And how does it benefit the car?

[@ali3lia]

@@user-bq2co6lh3x From what I know so far, top-tier gas has more detergents and hence a cleaner engine.

[@jayson657]

Most gas stations no matter the brand get filled by the same tanker truck. Just liked buying supermarket brand canned corn, chances are it was canned on the same line in the same plant as Green Giant, Libby’s and Del Monte just with different labels and prices.

[@jamescampolo7824]

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

[@guitarplayer4429]

33mpg? Non turbo I’m guessing?

[@jamescampolo7824]

@@guitarplayer4429 No turbo. I live in the desert where dirt gets into everything. Just one more piece of machinery to fail. Performance is fine being naturally asperated. I would never buy a turbo anyway, too much added stress on the engine.

[@guitarplayer4429]

@@jamescampolo7824 agreed, I was shown and drive the turbo, going back to drive a non turbo, I don’t need a race car, just something dependable

[@jamescampolo7824]

@@guitarplayer4429 I just changed my air filter from a K&N to a Purolator One after reviews on Project Farm found filtration better on the Purolator. so I reset the mpg. Driving my usual routes, about 40 miles per day, 50/50 city/highway, where I was getting 33.7, now after 125miles, it is reading 35+. Driving behaviour the same on the same daily routes, now with a new air filter and not using A/C (not needed now). I've been expecting the mpg to settle lower but it is still the same, +- 35. We'll see after 1kmiles. That's almost as good as my Honda Valkyrie 1520cc 6cyl bike which gets about 37 riding the same circuit.

[@markg999]

​@@jamescampolo7824 Thats impressive gains, might give one a try....we avg on our 14 Cx5 near 24 mpg but wife has alot of stop and go traffic....171k miles and runs quite well.

[@jamesecarson5631]

why does the Mazda dealership want to clean the carbon off the intake valves every ten thousand miles for $200 because of carbon buildup? If it is not done, the milage goes down from 50mpg to 35 mpg.

[@CadetClueless]

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.

[@TwoPair72]

No wonder my CX-50 runs better on Top Tier gas. I tossed in 89 and the mileage went up. I like the fact, he mentioned changing the oil every 6 not 12k miles. People that believe every 10 to 12 is fine, you're going to have sludge and problems.

[@akaitv6606]

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

[@tacuazinful]

For what year range?? Is it plástic???

[@isaactapia5517]

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

[@charlesbartholomew2910]

Not so much. I have the 2.5 Turbo in my CX-5. I change the oil and filter every 2500 miles, but that's me. The compression ratio of the 2.5L Turbo is less than the normally aspirated engine.

[@patrickgagnon9662]

You wrong , buddy !@@charlesbartholomew2910

[@lukeparagas2056]

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

[@l4dfreak101]

Lol no, my engine hasn't needed to be touched in 200,000 miles. Oil changes and new spark plugs is all I've had to do.

[@sailboatlighthouse]

​@@l4dfreak101have you ever serviced the transmission?

[@fastbreakr]

No. Just regular maintenance.

[@patrickkerner1471]

​@@sailboatlighthouseI would service every 30 k to prevent issues

[@treesixnine]

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

[@victorramsey5575]

Same here. My '21 Mazda6 Signature has 28k now. Recently took to Valvoline Instant oil change and they under-filled it. I wanted to add Prolong anyway and I bought a qt of Mobile 1 5/30 to top it off with (not the whole qt of course, but I did over-fill just a smidge...sigh...)

[@jamescampolo7824]

I just changed my oil/filter. Took more than spec (4.5qt), almost 5qt.

[@sekkaro5258]

Many CX5 owners have found for the 2.5L engine 5 quarts will fill it to the halfway mark, 5.4 quarts to fill to the max.

[@jamescampolo7824]

@@sekkaro5258 The stupid owner's manual says 4.5qt with a filter change. That is no where full. 5+ should be used with oil/filter change. Also, wait a while, like a half hour before checking the oil after adding. It takes a long time for the oil to get to the sump. But it still takes way more than the manual states.

[@MahasinRaihan]

Can I carbon clean it? Mine have 88k on the clock

[@JanStevenTrocio]

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

[@AllenTolbert-ld9ms]

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

[@samkitty5894]

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.

[@Gabriel.Jarelys]

What year is your Mazda?

[@JS-qj2sg]

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

[@guitarplayer4429]

3 cylinder CVT

[@oddballmedia]

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

[@jonshaffer5793]

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

[@gefreiterkurzmaul]

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.

[@dreadrechsler8278]

It's not really a problem on a Miller cycle engine like the SkyActive G is, but it's also not really a 14 to 1 compression. More correctly, it's 14 to one power stroke ratio since the intake valve is held open a bit long on the compression stroke.

[@patrickgagnon9662]

This engine has been proven for years ...whats your point , BMW failed at high compression not Mazda ....what is your point .

[@jaygee2116]

What type of fuel is best?

[@elbuchito2907]

It's designed to run on 87 from top tier gas stations.

[@csjrogerson2377]

Stretched timing chain at 50,000 miles is ridiculous. Caused by lack of oil changes.

[@fisalsawad3029]

أحسنت

[@toddsmith1617]

Anyone with GDI have carbon build up?

[@robertdevoy3119]

I understand Mazda defeated that problem in two ways. The engine has a built-in fuel/oil separator, so no aftermarket catch can is needed. Also, Mazda found that keeping the valves above 400 degrees F would prevent carbon build up, so they designed the head coolant passages to accomplish that.

[@Nordestada]

Carbon build up is normal for GDI engines, but occasional Italian tuneups would do the trick. Driving like a grandma would contribute even more to carbon building up. Watch videos on how to clean the carbon from the valves.

[@masafarmi7709]

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

[@jamescampolo7824]

Low detergent levels.

[@guitarplayer4429]

Yes, the cheapest, mid grade is just a little bit more I think, for now anyways.

[@chrisandjjjm7859]

149 k and not one single problem 2018 mazda 6

[@patrickkerner1471]

50 to 70 k on a chain, wtf? Thats less then a belt?

[@momichaux5054]

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...

[@DimitarKyuchukov-bm1om]

Aluminum? ALUMINUM?!?!?!

[@francbobek7113]

❤😂😢 0:21

[@lisaw7633]

😏

[@bryanmolloy839]

Worst engine ever 2.2

[@timothygibney159]

Too bad they burn oil and need ring replacements

[@timothygibney159]

@@notfiveo My mechanic says he gets 3 skyactiv engines a week needing reringing since they burn oil. He told me never buy a Mazda

[@martinneychev1661]

@@timothygibney159 yeah sure hahaha .... i got mazda 6 2015 2.5 petrol 80k kilometers and not a single drop of oil burned.......

[@stephenmurray2851]

​@@timothygibney159What mechanic? I want to phone him and call him an idiot

[@rick8125]

@@timothygibney159 Fool…

[@razorraysolarsavings70]

Dude you’re mechanic is wrong!!

[@user-yf7rt2pz2u]

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

[@rickstclair2217]

if a 4 cylinder, not interested

[@drowningfish8738]

Why

[@rickstclair2217]

@drowningfish8738 am a v8, 6 cylinder guy unless I buy a clown car, which I have no plans to do. also not interested in owning a turbo, either make the engine strong enough on its own or make it a 6 or 8.

[@SKA343]

I think it is crap 💩