Joe Gibbs break in oil

I used the Joe Gibbs break in oil on my sb 408 stroker, then went to the XP5 synthetic 20/50 race oil. My motor is highly modified though, with the high compression and roller cam and the such. I would stick with a high quality oil in your application no matter what, and if you are running a flat tappet lifter set-up the zinc and phosphorus in the oil should be concidered a must. A lot of the guys around here run the Joe Gibbs or Brad Penn oils.