Personally I use Penrite HPR15. Although i have never had the used oil analyzed. It seems to hold its colour and viscosity even after a thrashing on the track. I do change it fairly regularly though.
I guess proof would be in the wear marks or lack of, on the moving parts in the engine upon engine pull down.
Spec sheet for Penrite HPR-15
Im sure there are good news on the mobil 1 product, but I cant justify the expense at this stage, Although Oil selection is an important consideration when building performance engines, and engine protection. Quality oil used = increased chance of longer engine life.