Inliners International Forums General Discussion Engines Oil for a Chevy 250?

Wow after reading this thread, made me nervous. I used Pennzoil 10w/30 in my 250. I did add Rislone ZDDP additive. Dont know if that additive is any good or not.
I did see a parts store about 5 years ago somewhat close to me with Brad Penn signs in their window. Im thinking if they're high in ZDDP I may grab some.