The good news: My last 3 oil changes-PU, PP, PPPP, from oldest to most recent.
The bad news: I changed out the PP last week so it will be at least 6 months before we can compare the UOA's.
That said, SOPUS has never let me down, and I don't expect any variance in wear numbers/performance with the newer PPPP.
I know you want to protect your investment; rest assured, you have purchased an automobile with a long history of near bulletproof reliability from one of the premier engine builders in the world. Any name brand syn or dino oil in the approved grade will protect it equally well when faithfully maintained.