Walmart has it .... sometimes. Most of my racing buddies use 15-50 (non Crossfire) brands like Mobil 1, Valvoline, Motul, Brad Penn, Jose Gibs, Shaefer etc. The old air cooled Porsche swears that Shaefer oil lowered his oil temperatures by 20º. I don't know. I road race or I wouldn't think of it.

Les