I have stuck with the Mobil 1 but would not hesitate to swap to the Penzoil if people have had good experience with it and found it is just as good, if not a better oil.
My first oil change when I got my C6 was with Penzoil Platinum and I have been using it since. Patman SWEARS by it and has had it tested at a lab over the Mobil 1. Penzoil outdid the Mobil ! for quality after the same mileage as well as retained viscosity. It broke down far less.
 
I have stuck with the Mobil 1 but would not hesitate to swap to the Penzoil if people have had good experience with it and found it is just as good, if not a better oil.

me too but SilverSurfer got it all. There's none left for us. GEESH.










:rofl:-- Kudos SS. I do the same with Mobil 1 when on sale at PartSource.
 
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