2026 Mazda CX-5 Engine Oil

[filterXfilter]

Hello all, just recently purchased a brand new 2026 Mazda CX-5 with the 2.5 Skyactiv-G NA engine. Heard a lot of good things about this engine and wanted to give it a try (this is our first Mazda car). I plan on doing basic maintenance myself like oil changes once the free dealership ones are used up. With that said, Mazda has mentioned that this engine has been recalibrated for the new redesign 2026 MY. Any Mazda or skyactiv-G veterans on here? Which oil is the best to use for this engine? We do plan on keeping it as long as possible so I want what's best for it. I'm far from being an expert like you guys but with what research I have done, it seems like people like Mobil 1 ESP, Pennzoil Ultra Platinum, and some are even entertaining the idea of running Valvoline Restore and Protect early on. Are these engines picky, and should I lean towards better wear protection packages/higher moly/etc.? What are your experiences like? Thanks!

 

[kschachn]

You may find some information in these previous threads about what's the best oil for that engine. There are lots more if you look around. Some are directed to the turbocharged version, those would apply as well. Anything that works for the turbo engine works for your NA one.

W

Thread 'Advice on first oil change and beyond - Mazda CX-5 2.5 N/A'

Aug 8, 2025

Hello all,

I've been an occasional reader on BITOG, but after picking up a new CX-5 N/A 2.5L (no cylinder deactivation), I have found myself with some questions I'm hoping to get some advice on. My previous vehicle was a Mazda 3 with the 2.0L N/A SkyActiv. Bought used but did 7,000km (~4350mi) average OCIs (shortest OCI usually around 6000km, longest being 8300km) with OEM filter and Kirkland Synthetic 0W-20. I have never conducted a used oil analysis on this vehicle but from when I purchased used to 300,000km, it never burnt oil and ran smooth on the Kirkland oil (my subjective opinion)...

• wavycylinder8
• Replies: 31
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

• 

D

Thread 'CX5 2.5 S 0w20 vs 5W30 Engine Protection'

Apr 18, 2025

Will running 5W30 in non turbo CX5 2.5 S offer more engine protection and longer engine life? Plan to keep vehicle for over 100k miles. Turbo specs 5W30 so dealers should have it readily available.

Oil from manual
Mazda Original Oil Supra 0W-20
API SL/SM/SN or
ILSAC GF-III/GF-IV/GF-V
Mazda Original Oil Ultra 5w30
Alternative Oil Quality
API SN*4 or ACEA A5/B5
0W-20
5w30

• dylanm
• Replies: 15
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

T

Thread 'Mazda CX5 2.5 oil question'

Sep 17, 2019

Vehicle is a 2014 Mazda CX5 2.5L with 98,000 km. The maintenance logbook shows all services have been done at around 10,000 km or less.

A quick check on the internet suggest the suggested oil for our 2014 Mazda CX5 2.5L on a number of websites is a 0W-20. The handbook suggests we can use a range of oils from 0W-20 to 10W-50 depending on oil temps. Our local temperature range is -10deg C (14 deg F) to 45 deg C (115F)

In that basis, the manual says we can use either a 10W-50 or maybe a 5W-40 or 10W-40. Options on the oil I should use?

• Tallman
• Replies: 20
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

O

Thread 'Oil for 2021 Mazda CX-5 and Viscosity'

Aug 4, 2024

My wife has a 2021 Mazda CX-5 Touring with no turbo. We have been taking it to the dealer since new for 5K oil changes. I want to start changing the oil myself. What brand of oil is the dealership most likely using? They will not tell me. I have asked several times over the years. If it is not knowable, what brand of oil do you recommend?

Also, the oil cap calls for 0w20. The manual says that other countries use 5w30. Is it okay to move up to 5w30 for a little more protection? We live in North Texas where it is hot and doesn't get that cold.

I know you can probably use any oil and should...

• OwnOilChangeGuy
• Replies: 53
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

• 
• 

 

[filterXfilter]

You may find some information in these previous threads about what's the best oil for that engine. There are lots more if you look around. Some are directed to the turbocharged version, those would apply as well. Anything that works for the turbo engine works for your NA one.

W

Thread 'Advice on first oil change and beyond - Mazda CX-5 2.5 N/A'

Aug 8, 2025

Hello all,

I've been an occasional reader on BITOG, but after picking up a new CX-5 N/A 2.5L (no cylinder deactivation), I have found myself with some questions I'm hoping to get some advice on. My previous vehicle was a Mazda 3 with the 2.0L N/A SkyActiv. Bought used but did 7,000km (~4350mi) average OCIs (shortest OCI usually around 6000km, longest being 8300km) with OEM filter and Kirkland Synthetic 0W-20. I have never conducted a used oil analysis on this vehicle but from when I purchased used to 300,000km, it never burnt oil and ran smooth on the Kirkland oil (my subjective opinion)...

• wavycylinder8
• Replies: 31
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

• 

D

Thread 'CX5 2.5 S 0w20 vs 5W30 Engine Protection'

Apr 18, 2025

Will running 5W30 in non turbo CX5 2.5 S offer more engine protection and longer engine life? Plan to keep vehicle for over 100k miles. Turbo specs 5W30 so dealers should have it readily available.

Oil from manual
Mazda Original Oil Supra 0W-20
API SL/SM/SN or
ILSAC GF-III/GF-IV/GF-V
Mazda Original Oil Ultra 5w30
Alternative Oil Quality
API SN*4 or ACEA A5/B5
0W-20
5w30

• dylanm
• Replies: 15
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

T

Thread 'Mazda CX5 2.5 oil question'

Sep 17, 2019

Vehicle is a 2014 Mazda CX5 2.5L with 98,000 km. The maintenance logbook shows all services have been done at around 10,000 km or less.

A quick check on the internet suggest the suggested oil for our 2014 Mazda CX5 2.5L on a number of websites is a 0W-20. The handbook suggests we can use a range of oils from 0W-20 to 10W-50 depending on oil temps. Our local temperature range is -10deg C (14 deg F) to 45 deg C (115F)

In that basis, the manual says we can use either a 10W-50 or maybe a 5W-40 or 10W-40. Options on the oil I should use?

• Tallman
• Replies: 20
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

O

Thread 'Oil for 2021 Mazda CX-5 and Viscosity'

Aug 4, 2024

My wife has a 2021 Mazda CX-5 Touring with no turbo. We have been taking it to the dealer since new for 5K oil changes. I want to start changing the oil myself. What brand of oil is the dealership most likely using? They will not tell me. I have asked several times over the years. If it is not knowable, what brand of oil do you recommend?

Also, the oil cap calls for 0w20. The manual says that other countries use 5w30. Is it okay to move up to 5w30 for a little more protection? We live in North Texas where it is hot and doesn't get that cold.

I know you can probably use any oil and should...

• OwnOilChangeGuy
• Replies: 53
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

• 
• 

Thanks man! Still relatively new to the forum as well so there's a lot to surf through.

 

[buster]

Good engine with no special oil needs like most Japanese engines.

 

[Nessism1]

The main decision you need to make is whether to stick with 0W-20 or move to a 30 weight? The majority of experienced BITOG patrons, but certainly not all, would lean towards the thicker oil. That said, some people are worried about "voiding their warranty" if using anything other than the factory specified oil. Personally, I find this worry needless in all but a few random cases, and I've never heard one peep of comment regarding Mazda. The engine isn't going to blow up under warranty, so I say use what oil you like and don't worry.

 

[t1snwrbrdr12]

Been using any 0w20 I have on hand in my 2017 6 with 2.5 skyactiv. It does not lose use or burn any oil and I’m at 120plus miles. 5k oil change intervals.

 

[duck__dodgers]

The Skyactiv maintenance minder algo doesn't have a problem with short-tripping (even short-tripping in <32 F winters only results in a 500 to 1000 mile penalty). If you want to be extra conservative, change the oil earlier than the minder display. Cue the person who says that you're wasting your money and the oil by changing with 3,600 miles left on the OCI minder.

I don't have the scientific answer (testing 40 engines: 20 4/5k oil changes, 20 using the algo-recommended oil changes). do what works for you

 

[jadmt]

I use Pennzoil ultra platinum 5W30 in my skyactive 2.5 turbo you can't go wrong with any quality oil.

 

[JDenyer232]

Congrats on the new ride. My wife has a 23 cx5 and I have the 25 cx30 with the turbo. Both are fairly easy to work on, plugs are super easy to change. Choose any quality oil, I like Mobil 1 Extended Performance 5w30 for the turbo and 0w20 for the cx5. Change oil every 5000 miles. The only thing to be aware of is the electronic thermostat issues. For some crazy reason mazda on the NA versions replaced the simple mechanical thermostat with an electronic temperature control valve. They have been known to fail open. If you notice that it takes a lot longer than usual to warm up in the winter, that may be the problem. I had to do my previous 2019 cx5 twice. While not a bad job, each thermostat was $450! Of course shortly after mazda extended the warranty for that particular issue.

 

[filterXfilter]

Congrats on the new ride. My wife has a 23 cx5 and I have the 25 cx30 with the turbo. Both are fairly easy to work on, plugs are super easy to change. Choose any quality oil, I like Mobil 1 Extended Performance 5w30 for the turbo and 0w20 for the cx5. Change oil every 5000 miles. The only thing to be aware of is the electronic thermostat issues. For some crazy reason mazda on the NA versions replaced the simple mechanical thermostat with an electronic temperature control valve. They have been known to fail open. If you notice that it takes a lot longer than usual to warm up in the winter, that may be the problem. I had to do my previous 2019 cx5 twice. While not a bad job, each thermostat was $450! Of course shortly after mazda extended the warranty for that particular issue.

Thank you! Good to know, this is my first time hearing about the thermostat being a potential issue. Will definitely keep an eye on it next winter.

 

[Marcozi]

What does the owners manual say about oil specifications?

 

[Deamos]

I have a 2020 with the N/A engine. To make my own life easier I settled on 5k intervals and have stuck with 0w20 with occasional 6k OCIs.

Most recent changes have been with Valvoline synthetic (not Valvoline Restore and Protect), and the engine really seems to like that stuff. It runs quieter and very smoothly, but really any quality synthetic oil will be fine; these engines aren't particularly picky from what I've seen.

 

[Deamos]

Thank you! Good to know, this is my first time hearing about the thermostat being a potential issue. Will definitely keep an eye on it next winter.

There's a TSB for this, and they may have resolved it with a revised part by now.

 

[jadmt]

There's a TSB for this, and they may have resolved it with a revised part by now.

ditto my built in jan of 23 cx5 turbo has had no issues. apparently it is not an issue on turbo models. so that explains why I have not had an issue.

 

[jadmt]

What does the owners manual say about oil specifications?

straight from the 26 owners manual
U.S.A., Canada and Israel

Use SAE 0W-20 engine oil.

Mazda Genuine Oil is used in your Mazda vehicle. Mazda Genuine 0W-20 Oil is required to achieve optimum fuel economy.

For maintenance service, Mazda recommends Genuine Mazda Parts and Genuine Mazda Premium Oil.

Only use SAE 0W-20 oil "Certified For Gasoline Engines" by the American Petroleum Institute (API).

Oil with this trademark symbol conforms to the current engine and emission system protection standards and fuel economy requirements of the International Lubricant Standardization and Approval Committee (ILSAC), comprised of U.S. and Japanese automobile manufacturers.


Mexico

Use API SM or higher, SAE 5W-30 engine oil. If SAE 5W-30 engine oil is not available, use SAE 5W-20, SAE 0W-30 or SAE 10W-30 engine oil.

The quality designation SM, SN or SP must be on the label.

 

[kschachn]

ditto my built in jan of 23 cx5 turbo has had no issues

My son-in-law’s 2023 did have the issue and it was fixed under a warranty. I don’t know the month of manufacture.

 

[jadmt]

My son-in-law’s 2023 did have the issue and it was fixed under a warranty. I don’t know the month of manufacture.

I guess on the non turbo it can go thru 2025 but it apparently has not been an issue on the turbo so disregard my above.

 

[duck__dodgers]

Thank you! Good to know, this is my first time hearing about the thermostat being a potential issue. Will definitely keep an eye on it next winter.

the thermostat issue has been resolved for 2026. IIRC, certain prior years have an extended warranty for the thermostat. Ask Google for the TSB. you get a Pxxxx low coolant temp code + the coolant gauge stays under 190 F.

 

[Blang]

My sister has a '21 that will hit 100k this year. She's typically used the recommended 0w-20. I'm pretty sure Pennzoil Platinum has been the choice every time. When noticeable consumption was observed a couple years ago I told her to try 5w-30. That seemed to slow consumption down and I think the current plan is 0w-20 in the winters and 5w-30 in the summers. Pennzoil Platinum was a methodical choice in a way, but I think keeping any quality oil in those engines will allow it run as long as you want it to.

 

[Urshurak776]

My wife has a 2024 CX-5 (non-turbo) and I have a 2023 Mazda 3. Same exact engines. I have used some 0W-20, but lately have been using 5W-30. Both cars are at 30K. These engines aren't picky at all with oil. I Have used Kirkland, Quaker State, Pennzoil, Valvoline and Castrol. Both cars run great. I change oil every 5K and use a Premium Guard filter or OEM Mazda (Japan ones, not the MV Mexico ones.)