Originally Posted By: dparm
Definitely approved and not "exceeds Dexos1"?
Napa synthetic 5w30 (which is made by Ashland) states that it "exceeds dexos1 specifications"....this doesn't mean that it's dexos1 'approved'.
I think Carquest synthetic is made by Ashland (Valvoline) so are you sure it's 'approved'? From what I've read Ashaland has refused to pay the royalty fee that is required for 'approval'.