I ran Mobile 1 in my Eclipse for 90k (switched at 23k miles) miles and that was through 8 seasons of drag racing along with a few years of autoxing and oil was never a problem and the two turboes I upgraded to had zero coking on the bearings which was in part to proper cool downs but I just have a trust in M1 after the results I've seen up close no matter what other's data may be.
My '99 4Runner has seen nothing but M1 since it had 10,000 miles on it and now with 175k on it I have zero leaks and the engine is just as strong as my mom's '99 Runner with 80,000 less miles or at least in multiple 1/4 mile runs and both were equally slow.
I now run M1 in my STI and have no intentions of changing brands and if I had an ST it would get the same.
'12 Focus Red Candy SE Sport 5 spd
'99 Toyota 4Runner Sport
'11 Subaru WRX STI Hatch