[Zotic]

Mobil1

If under warranty, absolutely stay with Mobil1, it'll eliminate all controversies relative to any unforeseen engine failure(s).

 

[Zotic]

This is a screen shot from my computer. The window in the middle is from my owner instructional DVD I received with my 2010 GS.

Although it may not be crystal clear, it shows a quart of the Mobil 1 5W30 Extended Performance oil sitting on the engine.

I understand everything being said/discussed, but this is my evidence if anyone at GM questions why I have been using this oil in my LS3.

:buhbye:

Personally would consider the printed information in the manual to be of a better reliance, thereby dismissing any controversies that may arise regarding engine related concerns.

However a picture may serve, a manual is still considered a more reliable and proper resource for information, imo.