what oil to use

Racers are using very fast high lift cams, you ask any of them if zinc is needed for the cam to last they say of course.

This same topic has been on speedtalk-were pro racers are on-they think these oil company's are full of it saying non roller cams are fine using the smog oil sold in the stores today, even for everyday cars.

I been using not street legal oil in my motor for a year and a half, have no problems at all, maybe I am wasting my money, maybe not. I rather be safe than sorry. My motor gets rev to just over 6000 rpms almost everyday too.