GM 0w-40, Super Tech 0w-40, M1FS 0w-40, and Supercar.

[burbguy82]

This is a new thread that is kind of joining a few different threads. I find this topic to be very disingenuous as a whole, and looking for those opinions here about the fact pattern that these events elude to.

There are a few things I find interesting and coincidental and untruthful all at the same time..........

1.) About a month before the GM recall change, Supertech shows up with a random 0w40 with no approvals on the bottle, at the same price or more than M1 FS

2.) M1 FS all of a sudden is (by GM) a Dexos R rated oil, even though it has not had that approval in the past, nor does it still have it on the bottle as of yesterday.

I wonder how long GM knew that these engines AND I SUSPECT THERE WILL BE OTHERS< like the 5.3, and any other truck engine that is calling for 0w20.......were failing do to whatever, be it lack of lube, or bad materials, etc......

How many people have paid for this issue already, and got a new engine.? Even with the years before the recall.

I have been a GM truck guy my whole life, and I am glad they are making the "fix".......but their level of trust for me has been hurt. They need to take full ownership, Toyota style..........

I get it, you need the stuff in place to fix the issue, before you announce the issue......i get it, but how long has this been known at GM, years and years? Is it just to the point where there is no hiding it?

interesting Supertech jumped right to 0W40 and not 0W30

Unfortunately licenses and approvals do not transfer across grades, nor do additive packages.

Supercar isn't the only DexosR option: https://www.gmdexos.com/brands/dexosr/index.html

It should help get people past the warranty period....

 

[burbguy82]

I have been humming and hawing on going thicker for a long time. A little while back I decided to rid my garage of the 0W20 and went 5W30 because I was burning oil. Today I learned that GM has ended all debate on the topic by telling us to use 0W40 in an engine they were initially saying to use 0W20. I also learned that GM has on record 30,000 failed 6.2 liter engines because of 0W20.

So going forward it will be either 0W40 or 5W40 in my garage. Whether it be Ford.or GM it will be getting a 40 weight oil. The only question now is which brand exactly? Mobil? Castrol?

 

[burbguy82]

 

[IndyFan]

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Is that really a good idea to run a diesel oil in a C8? I think I would stick with M1 Supercar. I´m not sure I sould want a diesel additive package swirling around in such a high performance engine. I wouldn´t touch it for my C6, for sure, until I heard someone in the know, such as a Valvoline engineer, really explain why it would be good.

 

[burbguy82]

Is that really a good idea to run a diesel oil in a C8? I think I would stick with M1 Supercar. I´m not sure I sould want a diesel additive package swirling around in such a high performance engine. I wouldn´t touch it for my C6, for sure, until I heard someone in the know, such as a Valvoline engineer, really explain why it would be good.

I am not sure of much. But this is what comes up for Valvoline and the Corvette. Not Dexos R.

It was just an example

 

[shortyb]

There are a few things I find interesting and coincidental and untruthful all at the same time..........

Wait, what??!? A huge corporation that would stand to lose millions of dollars for a mistake they "had no idea about"??!? Say it ain't so .

Is skepticism one of the ingredients in the new 0W-40 approval package?

 

[4WD]

I don’t think ST has anything to do with the 6.2 issue. That motor came with P66 0W20. (Same as my Tahoe). That ST is not even an SP is it?
The diesel oil is not related to anything - GM puts Delvac in DMax.

I do think they fast tracked the Dexos R approvals - but were likely on the fence already with SuperCar hard to find …

 

[4WD]

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Valvoline is sloppy if that pops up.

 

[joekingcorvette]

I have been using 0W-20 in my Honda and Ford F-150 V8 for years without any problems but after reading all this hype about heavier oils I am seriously considering just moving up to heavier weights in these vehicles. On the other had I kind of doubt weather switching to a heavier weight on the 6.2 GM engines will help that much. IMO it's more of an engine design problem than an oil problem.

 

[4WD]

I have been using 0W-20 in my Honda and Ford F-150 V8 for years without any problems but after reading all this hype about heavier oils I am seriously considering just moving up to heavier weights in these vehicles. On the other had I kind of doubt weather switching to a heavier weight on the 6.2 GM engines will help that much. IMO it's more of an engine design problem than an oil problem.

I have run 5W30 in my 0W20 engines for years. I don’t really think of either as thick or thin - just know the hardware did not change when they cut viscosity on existing valve trains … and yes, it’s CAFE for that 0.02 gain nationwide …
The 2022 gets switched post warranty …

 

[ka9mnx]

I think GM's 6.2 problem is two fold. Bad engineering/design and improper oil grade. The dexos R 0w-40 is a quick and cheap fix. GM actually states that. It will be interesting to see if the grade change makes a difference.

 

[burbguy82]

I do think they fast tracked the Dexos R approvals - but were likely on the fence already with SuperCar hard to find …

Right, so when did this happen is my point. How long did they know? That is my point. A simple change in viscosity is the "fix" per the recall. It is or is not, nothing in between. Just becuase their is not a bunch of Supercar out there does not magically change the oil in the bottles. And if the change to 0w40 is the fix, then damage to the engine has been done, while using the oil they specified, therefore, GM should be liable for all the damages. Just becuase ow40 might help with cam/crank correlation for the time being, IMO, does not make it right.

IMO it's more of an engine design problem than an oil problem.

maybe, but if the fix is oil, then the original oil, must not have been adequate.

The 2022 gets switched post warranty …

Why care after the warranty? Did they cut the "engineered lifetime" and bit to close? It seems to me to be the case.

 

[burbguy82]

I think GM's 6.2 problem is two fold. Bad engineering/design and improper oil grade. The dexos R 0w-40 is a quick and cheap fix. GM actually states that. It will be interesting to see if the grade change makes a difference.

And also if they start using the oil as new, CAFE under the rug?

 

[nickaluch]

We have a 2024 GMC terrain in the family fleet it's almost due for a oil change. It's the second oil change first free from dealer. I'll be doing it has the 1.5 turbo motor calls for 0/20 I might go 5/30 dexos spec I have in stash. 0/20 in a small turbo is just a little bit to thin for me anyone disagree with this choice? 0/40 makes even more sense after GM move on the 6.2

 

[userfriendly]

And also if they start using the oil as new, CAFE under the rug?

CAFE is already under the rug. I’m one of the few Canadians that follows the CRAs in the American Congress.
YT content provider TK’s Garage seems to be well connected and provides daily summaries on the topic.
I don’t like thin engine oils or the variable pressure oil pump that the same engine design doesn’t have in the HDs.

 

[dnewton3]

I watched a new YT video last night from "I Do Cars" regarding an L87 engine that precedes the recall range, but has the exact same issue. The engine had nearly cooked one of the crank/rod journals to a crispy black; clearly a lack of "lubrication" to some degree.
Note: cannot link the video here due to embedded profanity.

He called into question the range of the recall, as well as why some other platforms don't seem to have the problems even though they are of the same displacement (Camaro and 'Vette) and timeframe. Further, many engines have used the same con-rod bearings for several iterations of engines with no problems, so it cannot be the bearings themselves. He alluded to the fact that it might be a manufacturing issue with the crank and not a design issue, but had no proof; only conjecture. If so, I don't see how a thicker oil is going to stop these failures, though it may delay them outside of warranty.

As time goes on, I think we'll see little parts of evidence start to amalgamate into the full story, but it will take time.

 

[4WD]

Right, so when did this happen is my point. How long did they know? That is my point. A simple change in viscosity is the "fix" per the recall. It is or is not, nothing in between. Just becuase their is not a bunch of Supercar out there does not magically change the oil in the bottles. And if the change to 0w40 is the fix, then damage to the engine has been done, while using the oil they specified, therefore, GM should be liable for all the damages. Just becuase ow40 might help with cam/crank correlation for the time being, IMO, does not make it right.

maybe, but if the fix is oil, then the original oil, must not have been adequate.

Why care after the warranty? Did they cut the "engineered lifetime" and bit to close? It seems to me to be the case.

I can’t follow the first part of your reply - but my 2022 is on a dealership warranty that requires them to do the oil changes. So that’s still the P66 0W20, but it’s a 5.3L as is my 2017 which ran 0W20 for 60k.
I run it to +/- 60% OLM and then boost with 2 quarts EC30 which is a mono with ester and moly etc …
(Hopefully it keeps it clean - 5 minutes with Fumoto, no ramps) …

 

[burbguy82]

though it may delay them outside of warranty.

Which is what I am thinking this is, a delay. well said

 

[ka9mnx]

I watched a new YT video last night from "I Do Cars" regarding an L87 engine that precedes the recall range, but has the exact same issue. The engine had nearly cooked one of the crank/rod journals to a crispy black; clearly a lack of "lubrication" to some degree.
Note: cannot link the video here due to embedded profanity.

He called into question the range of the recall, as well as why some other platforms don't seem to have the problems even though they are of the same displacement (Camaro and 'Vette) and timeframe. Further, many engines have used the same con-rod bearings for several iterations of engines with no problems, so it cannot be the bearings themselves. He alluded to the fact that it might be a manufacturing issue with the crank and not a design issue, but had no proof; only conjecture. If so, I don't see how a thicker oil is going to stop these failures, though it may delay them outside of warranty.

As time goes on, I think we'll see little parts of evidence start to amalgamate into the full story, but it will take time.

I've watched that video too. What I found interesting was it was the lower rod bearing that failed. I never saw a lower rod bearing fail before the upper in my, almost, 60 years of wrenching.

 

[4WD]

The 0W40 goes in post inspection …
(the definition of “inspection” is beyond me) …
There are allegations of clearance (outside of tolerance) - and machine finish not up to par …
Obviously they must “sort” the needs …