I'd like to see those tests, hate to say I've seen the opposite all though it was years ago when I worked with a lab doing them. I've ALWAYS used RP and never had any issues with them. I wasn't really going to stop using them even after reading what I read. It just sort of piqued my interest, and then my buddy tells me he deals Amsoil, so I asked for some prices, and in comparison, I can't really say no. It's especially handy seeing as how most of my savings is going to be go to paying medical bills. Damn bastards! I use their 2 stroke oil for my snowmobile as that tested well, not sure on their non-lube parts but their synthetic oil failed compared to normal Castrol in the tests that I saw. I wouldn't hesitate to recommend any lubricant from either Mobil 1 or Amsoil. Good shit....