I spoke with Ray Barton the other day about his rocker system. He said not to run synthetic oil with roller cams on the street. Claims the bearings fail sooner if you do. We were talking about high lift cams on the street at the time, like .750+, i'm pretty sure thats what he was saying because i have run roller cams on the street with synthetic oils for years and never had an issue with .700" lift and a solid roller. Anyone else ever hear this?