For those concerned about thin oil, hang on to your hats…

[FarNorth]

Many of us have wondered about thin oils in engines for example 5W20 and below. I think Ford was right go to 5W30 in our engines.
BUT, there’s now other manufacturers now promoting new thinner oils in their engines: 0W8… good grief. Maybe just use mineral spirits… or water… ‍
The only place to get this new oil is at the dealer for $20 a litre. This is bordering on a scam.
Thoughts?

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[Skye]

I was surprised to see same in the shops last week: 0W8. "fuel efficient".

Some models mentioned in the following article.

https://www.eneos.us/blog/0w-8-motor-oil-vehicle-models-include-toyota-and-mazda/#:~:text=Yaris Cross 1.5 Hybrid AWD,AWD Hybrid (2023 and newer)

Most of those listed are hybrids. My initial thought is these vehicles will operate primarily on the battery or under reduced load, the ICE not needing additional load protection. Not in every instance, but the engine will be charging the battery, not propelling the vehicle.

 

[FarNorth]

I was surprised to see same in the shops last week: 0W8. "fuel efficient".

Some models mentioned in the following article.

https://www.eneos.us/blog/0w-8-motor-oil-vehicle-models-include-toyota-and-mazda/#:~:text=Yaris Cross 1.5 Hybrid AWD,AWD Hybrid (2023 and newer)

Most in the article are hybrids. My initial thought is these will operate primarily on the battery or under reduced load and not need additional wear protection. Not in every instance, but the engine will be charging the battery, not propelling the vehicle.

Yes, my wife’s car is a Toyota due for return this month so we were looking at a replacement and when I opened the hood I saw the 0W8 and asked questions. When they told me yup… 0W8 and the price I told her this isn’t happening, go pick something else.

 

[jimbo67]

Yeah, my 2022 wrx used 0w20, and that is not na, kinda crazy. Previous years used 5w30. If you use a different weight do they bang you on a warranty claim?

 

[RJV15]

Yeah, my 2022 wrx used 0w20, and that is not na, kinda crazy. Previous years used 5w30. If you use a different weight do they bang you on a warranty claim?

You best believe it would void your warranty

 

[Rocket Man]

Oil tech has improved greatly over the years, but 0W8 sounds kinda sketchy. My 392 Dodge uses 0W40 and many, many users are seeing 200K miles with this oil.

 

[timd38]

My s550 and F150, both 5.0 use 5w20. Since my 2024 is 5w30, i am going to start using 5w30 in those two as well.

 

[robvas]

You best believe it would void your warranty

are there documented cases where a ford dealer denied warranty on an engine failure because of the oil? And the oil wasn't something ridiculous like straight 50 weight

 

[DarkMatterGrey]

Many of us have wondered about thin oils in engines for example 5W20 and below. I think Ford was right go to 5W30 in our engines.
BUT, there’s now other manufacturers now promoting new thinner oils in their engines: 0W8… good grief. Maybe just use mineral spirits… or water… ‍
The only place to get this new oil is at the dealer for $20 a litre. This is bordering on a scam.
Thoughts?

I am trying to understand why Ford did this. I traded my 2022 6 speed manual Ecoboost Mustang for the 2024 6 speed manual Coyote and it too called for the same WSS-M2C961-A1 spec because "it can reduce oil derived low speed pre-ignition," which apparently is a big concern with GDI Turbo engines. So while it's not only 5W-30, I believe this oil spec has reduced calcium as part of its additive package to reduce this "LSPI" problem.

 

[Eli GT]

My wife's then new '21 Toyota Highlander, V-6 called for 0W-20. Toyota wanted to change it every 10K miles if you had a couple free oil changes. I told them to stick it, I'll pay to have it done every 5K, with 0W-20 Mobil 1.

 

[Cz_Ziemniak]

Its all for the EPA's emissions standards. low viscosity oils, low tension piston rings, its all for an extra 1 or 2 mpg's at the expense of our motors.

I was lead to believe for years that its an issue of clearances, but I've since learned that's all bullshit. If you read into it, most engines are happiest with 5w-30, where the film strength is enough to keep our bearing surfaces slipping along each other whilst also being easy enough to pump through all the individual gallies without issue.

With that being said, do your own research, don't just take it from me. Make your own educated opinions on the topic.

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