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

[webfors]

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.

Selfishly trying to map it to Dexos1G3 spec so I can use it in the ATS’s, both turbo.

The comment by GM about every DexosR oil being backwards compatible with D1G3 gives us forced induction nerds a path to 40 weight without the LSPI risk, approved by GM.

But that’s off topic

Thanks for confirming, cause it’s on sale here in Canada.

 

[JavierH19]

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.

I'd love a 6l90 over this annoying 10 speed. I wonder if they considered making a new "4.3" out of the 6.6 block by taking to cylinders off and making a 5.0 v6. It'd still have plenty of torque being a bit under the 5.3 but with no afm to fail. I'd be wonderful if they could go back to port injection all together.

 

[webfors]

Don’t know if this was posted already, but it’s dated 05/25.

https://www.mobil.com/en-cn/passenger-vehicle-lube/pds/ap-zh-mobil-1-0w-40

 

[userfriendly]

Don’t know if this was posted already, but it’s dated 05/25.

https://www.mobil.com/en-cn/passenger-vehicle-lube/pds/ap-zh-mobil-1-0w-40

M1 0W40 FS now has a GM part number. That didn’t take them long.
#888 614 47

I found three 0W40 oil fill cap numbers.
#126 697 92 which I think is the warranty replacement cap for the 6.2L LT engine.
#126 864 72 must be for a Corvette because it’s $69 instead of $11.
And #126 807 08.

I’d like to find one that fits a 3.6L LGX in a 2022 Acadia. I’m sitting on six jugs of M1 0W40 and I have to put in what the oil fill cap says.

 

[ammolab]

M1 0W40 FS now has a GM part number. That didn’t take them long.
#888 614 47

I found three 0W40 oil fill cap numbers.
#126 697 92 which I think is the warranty replacement cap for the 6.2L LT engine.
#126 864 72 must be for a Corvette because it’s $69 instead of $11.
And #126 807 08.

I’d like to find one that fits a 3.6L LGX in a 2022 Acadia. I’m sitting on six jugs of M1 0W40 and I have to put in what the oil fill cap says.

126 864 72 must be overpriced on your site…it’s $19.95 on Amazon. I have one on my SS LS3.

https://www.amazon.com/ACDelco-FC26...cphy=1022528&hvtargid=pla-2281435177818&psc=1

 

[webfors]

M1 0W40 FS now has a GM part number. That didn’t take them long.
#888 614 47

I found three 0W40 oil fill cap numbers.
#126 697 92 which I think is the warranty replacement cap for the 6.2L LT engine.
#126 864 72 must be for a Corvette because it’s $69 instead of $11.
And #126 807 08.

I’d like to find one that fits a 3.6L LGX in a 2022 Acadia. I’m sitting on six jugs of M1 0W40 and I have to put in what the oil fill cap says.

Oooh, I want one! Looks like they'll fit the ATS LTG

 

[webfors]

Just posted and we might have the first side by side comparison of the add packs in the old/new FS. I asked OP to confirm with pics and previous fill.

Thread 'Mobil 1 0W/40FS European Car Formula 2.7k mi; 2002 Ford Ranger 3.0L Vulcan 111.8k mi'

May 1, 2025

Not much to report, obviously it sat a lot.

• DuckRyder
• Replies: 9
• Forum: Used Oil Analysis - Gasoline

• 

I'm liking the new FS with the low calcium for LSPI in the ATS's. I've always been hesitant to run the OLM out, which is around 7k miles with 5w30 because of the shearing/dilution. For $8 more (M1 sale at WM) than the ST I'm using I could likely go the full OLM and still be in 30 grade at the end.

 

[Aston4]

snip
__________________________________________________________________

Now excuse me while I call the Subaru dealer for a service appointment before my new car shakes itself apart, I guess they don't know how to mount and balance cheap Firestone tires in Japan.

edited out mild jabs 1308hrs

Firestone/Bridgestone have always been garbage. Always. In the 1970s they were garbage. Today they are garbage. Why Japan can make the most fantastic stuff, yet has never made even a "sort of OK" tire, let alone a good one, baffles me.

Those tires will never not vibrate. Just throw them away and make the pain stop. Also, it is not the axles. It is not the brakes. It is not a CV joint. It is not the wheels or the alignment or the transmission or anything else. It is the tires, regardless of what the balance machine says. Just throw the tires away.

 

[BMWTurboDzl]

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

Why wouldn't they?

 

[Bill7]

So in other words there is a defect in some connecting rods and cranks and the solution is to use thicker oil. Yeah ok

It all comes down to cost to GM of a warranty repair: Cost of one 0W-40 oil / filter change, versus the cost of an engine rebuild.
GM chose the frugal way out.

But it does reinforce what we already knew. Higher HTHS oil protects better.

 

[xmanjeff]

It all comes down to cost to GM of a warranty repair: Cost of one 0W-40 oil / filter change, versus the cost of an engine rebuild.
GM chose the frugal way out.

But it does reinforce what we already knew. Higher HTHS oil protects better.

it would be interesting to know the numbers of;
- engine failures that were not covered under warranty one way or another or covered under an extended warranty of some sort
- engines replaced on new trucks that never left the lot

 

[Bill7]

it would be interesting to know the numbers of;
- engine failures that were not covered under warranty one way or another or covered under an extended warranty of some sort
- engines replaced on new trucks that never left the lot

Probably confidential data that GM will keep secret.

GM needs exhaustive quality assurance of every part and every vehicle redesign generation.
They could really transform their company over the next decade to rival Toyota in reliability if they really wanted to.

 

[buster]

Don’t know if this was posted already, but it’s dated 05/25.

https://www.mobil.com/en-cn/passenger-vehicle-lube/pds/ap-zh-mobil-1-0w-40

That's in China though, although should be same globally I would think.

This is from November 2024 (0w40 SP)

 

[redhat]

Might have already been posted… at least one post was a link to a Mobil page. Anyways - M1 Euro FS 0W-40 and ESP X4 0W-40 now both say on the Mobil site that they have the Dexos R approval.

Wild times!

M1 FS 0W-40

M1 ESP X4 0W-40

 

[billt460]

Thicker is better. GM could have come here years ago and saved a lot of money and aggravation. All they had to do was ask.

 

[ATex7239]

Hey guys y'all should be careful using 40. I heard using a thicker oil can shear the drive shaft off your oil pump.

Too soon?

 

[Jetronic]

Hey guys y'all should be careful using 40. I heard using a thicker oil can shear the drive shaft off your oil pump.

Too soon?

and it takes AGES to circulate to the top end after a cold start and that's where ALL the wear happens.

the tope end is like the hangman in hatefull 8. "come here, molasses like"

 

[ATex7239]

and it takes AGES to circulate to the top end after a cold start and that's where ALL the wear happens.

the tope end is like the hangman in hatefull 8. "come here, molasses like"

You wouldn’t want to void your warranty by using a higher viscosity oil in a new vehicle. Besides the engineers know what they are doing.

 

[Pablo]

We got people here who freak when a 10.4 cst XW-30 ends up at 11.0 cSt after 15,000 miles. I mean we are talking road tar north of the arctic circle thick.

 

[Nuclear_42]

You wouldn’t want to void your warranty by using a higher viscosity oil in a new vehicle. Besides the engineers know what they are doing.

Same engineers that said 0w-20 was perfectly fine in a 6.2L L87 right?