The Brad Penn will be fine,all the racers around here use that or Joe Gibbs. Just another note Valvoline did have an racing oil that had the zinc,or at least they did 2 years ago when we where running the 305 sprint car which had a flat tappet cam. I can't remember the specifics on it but it cost more than the regular valvoline racing oil and it had printed on the front of the bottle "Illegal for street use" and I think it also had "not for sale in California" Even with using that oil I still added a bottle of G.M.'s EOS from my stock. "When I heard it was gonna become unavailable I bought up all I could find."