GM now saying to use 0w40 in 21-24 6.2L

[kschachn]

Well.....IDK what to think of that since after May 31st, 2024 production l87's are not going to 0w40..... yet the newest replacement engines are. That's where my confusion comes from.

My direct experience with all this further confusion. My twin sis has a 23 Suburban with the L87 and I called her last week to let her know. She took it to our dealer and to my surprise it actually had the P0016 code. They stated she needs a new engine and is now on the list for one. BUT....while it was there, they did an oil change and put 0w20 back in it. I checked the receipt they gave her and sure enough the receipt had part number for of 0w20 oil....8 quarts of it (guess they did a flush, idk). She said they were adamant about NOT putting 0w40 in it at this time.

After a few days of her driving it I plugged into it with my HPTuners hardware/software to see if the code was back yet.... and it is not.

Which if true would be another poor design, unrelated to bearings or clearances.

A nannying system perhaps or a poorly designed control system.

 

[Shel_B]

This discussion has gone stupid. Amazon has the M1 supercar oil. They did raise their prices 15% last night, but the oil is readily available. If not, Amsoil 0W-40 is readily available too.

Walmart 0W-40

 

[The Blur]

My twin sis has a 23 Suburban with the L87 and I called her last week to let her know. She took it to our dealer and to my surprise it actually had the P0016 code. They stated she needs a new engine and is now on the list for one. BUT....while it was there, they did an oil change and put 0w20 back in it. I checked the receipt they gave her and sure enough the receipt had part number for of 0w20 oil....8 quarts of it (guess they did a flush, idk). She said they were adamant about NOT putting 0w40 in it at this time.

After a few days of her driving it I plugged into it with my HPTuners hardware/software to see if the code was back yet.... and it is not.

I would trade it in before the motor explodes. I was at my local Caddy dealer yesterday, they have 5 escalades completely taken apart. Bumper off, motors out, waiting on parts.

 

[The Critic]

Just to be clear -- the 0W-40 rec isn't for all 6.2L engines:
https://gmauthority.com/blog/2025/0...-oil-in-your-non-recalled-gm-6-2l-l87-engine/

 

[RhondaHonda]

Looks like they are extending the warranty on affected engines to 150,000 miles /10 years. That is somewhat reassuring.

https://gmauthority.com/blog/2025/0...-recall-unrelated-to-valve-lifter-issues/amp/

 

[D60]

Looks like they are extending the warranty on affected engines to 150,000 miles /10 years. That is somewhat reassuring.

https://gmauthority.com/blog/2025/0...-recall-unrelated-to-valve-lifter-issues/amp/

I love weasel wording like this, common in most recalls:
"As for the current L87 recall, vehicles will be inspected to determine if they exhibit either of the known manufacturing defects (rod bearing damage, out-of-spec crankshaft)"

It's disingenuous as it suggests those components will actually be measured with a micrometer or even direct line-of-sight. I understand this is how the world works, but the Average Joe is going to think their dealer is actually tearing the crank out to check it over

 

[SubieRubyRoo]

The question is: do you use this Super Car oil in all LS motors now?? The M1 webpage states "backwards compatible".
I have a few LS motors. LSA, LT4, L something in my work truck. I am considering this new oil now..

Just pick up the phone and call HPL. Guys like @BrendanC are using 5w30 HPL for 12k intervals with zero failures. If HPL’s basic PCMO 5w30 can handle 15-20k OCIs in some of the roughest fleet use you can imagine, why bother paying $10/qt for M1 “SuperCar” when it’s not really all that super?

 

[BrendanC]

Just pick up the phone and call HPL. Guys like @BrendanC are using 5w30 HPL for 12k intervals with zero failures. If HPL’s basic PCMO 5w30 can handle 15-20k OCIs in some of the roughest fleet use you can imagine, why bother paying $10/qt for M1 “SuperCar” when it’s not really all that super?

dave is top notch when it comes to customer service. he assured me their PCEO line would have no issues going the distance and the few UOA’s i have show that.

 

[buster]

Still sticking with that 3% figure.

 

[userfriendly]

Maybe for 2026 they will drop the 6.2L altogether and put the 6.6L truck engine in everything.
No more stop/start, 0w20, variable oil pumps, cylinder dropping or fake engine noises generated by the sound system nonsense.
They might as well put the 6L90E six speed back in instead of the troublesome 10 speed while they’re at it.

 

[D60]

Still sticking with that 3% figure.

View attachment 277865

"Expected to have problems"

I believe this is like human spines: perhaps only 3% of people need back surgery but we all have spines that are less-than-ideal, and most adults would show a herniated disc with an MRI.

Asymptomatic doesn't mean there's not a problem -- it just means ignorance is bliss

 

[zzyzzx]

Looks like they are extending the warranty on affected engines to 150,000 miles /10 years. That is somewhat reassuring.

Actually, I agree. I'm impressed that they didn't only go out to 100,000 miles like automakers often do.

 

[userfriendly]

Actually, I agree. I'm impressed that they didn't only go out to 100,000 miles like automakers often do.

GM should do the same with the 3L Diesel. That way owners would get the first two oil pump belts that requires the transmission to be removed to get at it, replaced for free.

 

[Lawnman23]

GM should do the same with the 3L Diesel. That way owners would get the first two oil pump belts that requires the transmission to be removed to get at it, replaced for free.

People love to have a diesel, people forget about and then hate the maintenance of that diesel.

I guess if pockets are deep and the dealer does it all then who cares but I feel sorry for any poor soul that does their own maintenance when it comes to items like that.

 

[webfors]

Interesting thread.

What I learned.

Thin oils have always been about CAFE.
Some cars can run forever on thin oils.
Some cars can't run forever on thin oils.
Use heavier viscosities to mitigate the risk on the latter.

 

[wemay]

Interesting thread.

What I learned.

Thin oils have always been about CAFE.
Some cars can run forever on thin oils.
Some cars can't run forever on thin oils.
Use heavier viscosities to mitigate the risk on the latter.

This is actually fair.

 

[webfors]

Strange that a full SAPS (FS) oil can make the DexosR list, with the implication that they are backwards compatible to Dexos1Gen3, implying they are safe for LSPI protection.

Do we have VOAd showing these oils safe for LSPI? If not, what’s changed?

 

[OVERKILL]

Strange that a full SAPS (FS) oil can make the DexosR list, with the implication that they are backwards compatible to Dexos1Gen3, implying they are safe for LSPI protection.

Do we have VOAd showing these oils safe for LSPI? If not, what’s changed?

M1 FS 0W-40 is API SP, so yes, it's LSPI safe, though keep in mind LSPI is primarily an issue for forced induction DI applications, not naturally aspirated ones.

 

[Jetronic]

The winter rating isn’t about fuel economy.

it might be if the fuel economy test starts with a cold engine. Well, it wouldn't be because of the winter rating, but the associated higher viscosity index.

 

[Jetronic]

Still sticking with that 3% figure.

View attachment 277865

if this was true (3%) then they all grenaded already, and half of them twice.