After reading the threads about oils for race motors, what commonly available oil is best for a cruiser engine that is still banging a hydraulic non-roller cam? Im not about to drop the $$ for Brad Penn when the case price is more than street value of my 455. What is reasonably good oil that is affordable, and can be found at a local parts store. Grade info would be helpful too. Im not opposed to synthetic if it is worth the stretch. I was leaning toward Rotella as I heard the diesel oils still have a reasonable zinc package.