- Joined
- Dec 30, 2006
- Messages
- 29,558
Endorsed/recommended by oems? I've seen these stamped on oil fill caps and recommended in owner's manuals. GM had M1, Audi had Castrol, Hyundai had Quaker State, Dodge had Pennzoil, etc. I can't recall ever seeing Valvoline recommended by an oem. I've also never seen Valvoline in any convenience stores or gas stations.