I use Redline and have a slew of UOA's with excellent results ..
I'm sure Amsoil is good stuff , but I don't care for the way it is marketed , at least by the person I know , who was one of the first distributors , super nice guy , but anything other than Amsoil , in his eyes is just garbage ..
I also question a test conducted by Amsoil in their lab with their equipment and personnel , if it's so good , which it may well be , why not let an outside source do the dyno run and send the oil to an independent lab , and let them post the results ??
So Many Highways So Little Time