More NASCAR Sprint Cup and top NHRA crew chiefs use Valvoline. Valvoline Racing Oil's exclusive chemistry is designed to reduce friction and enhance power. Formulated for race engines, but compatible with passenger vehicles too. High zinc/phosphorus provides extreme wear protection, including flat tappet applications. Additional friction modfiers to help deliver maximum horsepower. Enhanced anti-foam system protects engine during extreme stress. Compatible with gasoline or alcohol fuels. Available through leading auto parts retailers.