GM Recommended oils
http://www.gm.com/corporate/responsi...ngine_oils.pdf
I paid for it once, got about 4 months/2800 miles into the oil life and I was 1.5 quarts low.
I switched back to Valvoline SynPower and I don't burn any oil...just my personal experience...I do drive mostly city though, 30-40 mph 12-20 miles a day during the week.
EDIT: The Amsoil was 5W30.
Last edited by Bryan921SS; Apr 19, 2011 at 01:29 PM.
I've never burned oil... GTX, before I swapped to M1, then moved to RP, we'll see how the Rotella does, only a week and 600 miles old.
schaeffers is the only oil im aware of that wil float bearings with zero oil pressure and its not on the list so ya know
fyi Napa branded oil is Valvoline in a napa wrapper just so save you a little $$$ also had a castrol oil rep tell me all this "specially formulated" oil is just the same oil they have always produced, like a synthetic blend might be better for high mileage so they call it that
and i believe orileys is havoline cant remember them all any more
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I now use Mobile1 5/30w spring thru summer and 0/30w in the winter.


