XXL, our cam lobes went bad due to pour lubrication, not a flow problem. I suspect the cam or lifter was not 100% and the lack of Zinc caused the wear. You cannot expect every lobe of every cam to be perfect, same is true for lifters. With the proper oil, they would of worn in just fine, just have they have done for the last 50 years. But now, with the reduced wear agents, its more important then ever to check and double check everything. Joe
