From what I've seen over the last 2 years, PP is as good or better than any boutique brand up to a 10k mile interval. At that point I think Amsoil is the best. I think PP has proven to be one of the best. What do you all think? Only weakness of that oil is the volatility on the PDS, yet, in other testing it's shown to be much lower. Noack in the 8-10% range.