opfor2
Full Access Member
Wow, $ 12.57 a quart for ACDelco 5w30 motor oil??I looked that oil up and it ain't Dexos1 Gen 2 certified. That's the kind of oil GM spec'd to run in your motor and you chose something else.
This is what you want if you wish to stick with Pennzoil:
This is what GM currently specs for your LS engines:
Compare the stats, the ASTM stats, and see how yours match up or don't.