BREAKING: GM is officially recalling the L87

[BADRIDES]

I have customers adding Lucas oil treatment when they get an oil change

 

[WalleyeMikeIII]

GM OLM works pretty simple and primitive. It's the number of cold starts, plus the engine run time, like 350 hours (I've never gotten that far because I change mine by mileage), 7500 miles, and 1 year. So every 35 hours of engine run removes 10%, every 750 miles removes 10%, and every day on the calendar removes 0.27%, every month about 8.33%.
In our region, where GPS is jammed, time starts jumping chaotically, and once in my car the time jumped forward by 1 month, I reset it correctly, then after 5 minutes it jumped forward by 1 month again, I reset it again, and for the third time the time jumped forward by 1 month, as a result the oil life in 15 minutes decreased by 25%)

My understanding has always been that it counts engine revolutions, has a fixed number of them per fresh oil change, and each revolution can get "derated" by factors such as temperature and how far away it is from nominal. Overheats take it to zero right away. They added a time and mileage cap as the system matured. Here is a bulletin from GM explaining it in a bit more detail. This stuff all accounts for different usage, idle time, loading, etc. The research took place over seveal years, and if you dig, you will find the system to be quite accurate at predicting oil life as confirmed w/ used oil analyses. Of course, this all goes out the window if you have bearings shedding metal because they or their running surface was defective.

https://static.nhtsa.gov/odi/tsbs/2018/MC-10137589-9999.pdf

 

[Vladimir2306]

My understanding has always been that it counts engine revolutions, has a fixed number of them per fresh oil change, and each revolution can get "derated" by factors such as temperature and how far away it is from nominal. Overheats take it to zero right away. They added a time and mileage cap as the system matured. Here is a bulletin from GM explaining it in a bit more detail. This stuff all accounts for different usage, idle time, loading, etc. The research took place over seveal years, and if you dig, you will find the system to be quite accurate at predicting oil life as confirmed w/ used oil analyses. Of course, this all goes out the window if you have bearings shedding metal because they or their running surface was defective.

https://static.nhtsa.gov/odi/tsbs/2018/MC-10137589-9999.pdf

Yes, that's right))) I always change it based on mileage, every 7500 miles, I don't have a lot of downtime or long warm-ups)

 

[CCPLuvr]

Looks like GM is sticking to their guns on the 0W-20:

https://gmauthority.com/blog/2025/05/should-you-use-0w-40-oil-in-your-non-recalled-gm-6-2l-l87-engine/

 

[Vladimir2306]

Looks like GM is sticking to their guns on the 0W-20:

https://gmauthority.com/blog/2025/05/should-you-use-0w-40-oil-in-your-non-recalled-gm-6-2l-l87-engine/

This is exactly what I wrote about: switching from 0-20 oil to 0-40 oil on your own will result in loss of warranty.

 

[cornicekurt]

Looks like GM is sticking to their guns on the 0W-20:

https://gmauthority.com/blog/2025/05/should-you-use-0w-40-oil-in-your-non-recalled-gm-6-2l-l87-engine/

 

[KMeloney]

No way they are replacing all engines when there is only a 3-5% failure rate. Just can't see that happening. That's what the 10yr/150K warranty is for. Guess we will have wait and see though.

Until someone (GM, really) can say that there is a "max mileage" failure threshold after which a '21-'24 6.2 is no longer in danger of failing, then I think that establishing a "failure rate" based only on the engines that have ALREADY failed -- as though no more will fail -- is short-sighted at best.

If it could be said that all of these failures occurred under 5000 miles, say, and that if you're beyond that mileage you're in the clear, then a lot fewer of us in this thread would be concerned. But, as far as I'm concerned, that "failure rate" is nothing more than "the current failure rate," and has the potential to grow wildly.

 

[Antonm]

This is exactly what I wrote about: switching from 0-20 oil to 0-40 oil on your own will result in loss of warranty.

This is NOT true, stop spreading this lie.

Did you even read the article linked? it said "could" , words freaking matter when corporate lawyers are involved. Anything "could" void a warranty if GM could PROVE that whatever you did was the sole root cause of the issue you're clamming warranty for.

At least here is the U.S. we have a law that specifically prevents a manufacture from voiding warranties for such things (link below, again, to the federal trade commission's website).

Magnuson Moss Warranty-Federal Trade Commission Improvements Act

Title I of this Act authorizes the Federal Trade Commission to develop regulations for written warranties.

www.ftc.gov

...

 

[23Seven]

If you don’t go to the dealer for whatever the “remedy” is, you won’t get the special coverage for the survivor engine. Has to get registered in your vehicle history as having the “remedy” and “inspection” performed.

Will they do the inspection if my Tahoe’s VIN is not part of the recall? It was built in 2023 so it should be part of the recall but my VIN still shows no recall.

 

[Vladimir2306]

This is NOT true, stop spreading this lie.

Did you even read the article linked? it said "could" , words freaking matter when corporate lawyers are involved. Anything "could" void a warranty if GM could PROVE that whatever you did was the sole root cause of the issue you're clamming warranty for.

At least here is the U.S. we have a law that specifically prevents a manufacture from voiding warranties for such things (link below, again, to the federal trade commission's website).

Magnuson Moss Warranty-Federal Trade Commission Improvements Act

Title I of this Act authorizes the Federal Trade Commission to develop regulations for written warranties.

www.ftc.gov

...

Come on, if 0-20 oil is recommended in your engine, and you pour 0-40 there, this will not lead to a waiver of the warranty?