Synthetic Oil

[Travis8352]

I was really impressed at how clean the piston was after the IIIH test

 

[Hemi395]

https://amsoilcontent.com/ams/lit/databulletins/g2880.pdf

Heres the new amsoil specs. I attatched the old PDS here for folks to compare.

The NOACK on that entire lineup is impressive....

 

[Burla]

I don't think we talked about this one, Chevy l87, yeah that 0w20 thing, turns out dat dog don't hunt.

General Motors issued a massive safety recall and subsequent Technical Service Bulletins (TSBs) for 2021–2024 trucks and SUVs equipped with the 6.2L L87 V8 engine due to a risk of catastrophic engine failure. For affected vehicles that pass dealer inspection, the official fix requires switching from the factory 0W-20 to Mobil 1 FS 0W-40 full synthetic oil and replacing the oil cap. [1, 2, 3]

Key Recall and Oil Changes Facts:

• • The Problem: The factory 0W-20 specification was deemed too thin to maintain a sufficient oil film under extreme pressure and high loads, which led to metal-to-metal contact and connecting rod failures. [1, 2]
  • The Remedy: If your L87 engine passes inspection, the dealership will use 8 quarts of 0W-40. They will also install a new oil cap that clearly indicates the new viscosity so future mechanics know not to use 0W-20. [1, 2, 3]
  • The Approved Oil: GM dealers are specifically instructed to use Mobil 1 FS 0W-40. Be aware that not all 0W-40 oils are Dexos-approved, and sticking to this specific blend ensures your warranty is protected. [1, 2, 3, 4, 5]
  • Side Effects: Because thicker oil creates more internal drag, you may notice a minor drop in fuel efficiency, but it provides vital cushioning for potentially compromised engine bearing

 

[Burla]

Recalled 600-700k trucks just to change them to 40 weight, lol.