New 0W-40 oil and extended warranty talk

[Keewatin427]

 

[Keewatin427]

I’m just over 20,000 miles. I’m hoping my 6.2 passes muster and I get the extended warranty in the meantime. I’ve heard all the replacement wait time stories. Don’t want that smoke.

 

[TexOffroader]

I learned a couple of things from this but if the guy has lots of experience with this engine like he says he does, then why didn’t he reveal the L87 data between 0W-20 and 0W-40 in common scenarios? I do feel better about the big switch though.

 

[AXE]

Good video! I always thought it was a safe bet to run a higher viscosity for severe duty use. I would say in Arizona with temps around 110-115, a higher viscosity oil would be better.

Like @TexOffroader said, why the big jump though? Why not just 0W30? That still a bit of a head scratcher. To me, it just further indicates that we have bad bearings and cams and they are worn more than normal for the age of the vehicles. GM just buying some time, no real magic.

 

[cef2lion]

If you read the article below. Near the end it says if you pass the inspection you get the extended warranty. If you fail and get a replacement engine you don’t get the extended warranty with the replacement engine.
https://gmauthority.com/blog/2025/05/gm-6-2l-v8-l87-engine-recall-unrelated-to-valve-lifter-issues/

 

[KLA]

If you read the article below. Near the end it says if you pass the inspection you get the extended warranty. If you fail and get a replacement engine you don’t get the extended warranty with the replacement engine.
https://gmauthority.com/blog/2025/05/gm-6-2l-v8-l87-engine-recall-unrelated-to-valve-lifter-issues/

Yes. Exactly correct.

 

[185EZ]

Good video! I always thought it was a safe bet to run a higher viscosity for severe duty use. I would say in Arizona with temps around 110-115, a higher viscosity oil would be better.

Like @TexOffroader said, why the big jump though? Why not just 0W30? That still a bit of a head scratcher. To me, it just further indicates that we have bad bearings and cams and they are worn more than normal for the age of the vehicles. GM just buying some time, no real magic.

I agree. Seems like a big jump to 0w40. The oil geek said they used to use 5w30 which I might go with.
I'll never see -35*F for starting and don't care about saving fuel.
Different motor but my Mercury OB calls for 10w30 or 25w40. You can hear the motor turn over more slowly with 25w40 so I'll be changing that end of summer and go back to 10w30.