a buddy of mine swore by it ran it in his diesel. 80,000 miles his main bearings went out....
Idk may of not been oils fault, but if you go on thier website the graphs they have show that thier oil does not break down, all oil breaks down(just looked at thier website and they have changed the graphs, but still show to be mega superior, they also change from different types of "comp" oil in diff tests). just not a fan of how they do business and how they represent thier product or how it performs. Motul for me call them they will explain every chemical or additive they use and why.
Heres the link.
http://www.amsoil.com/products/streetbikes/WhitePaper.aspx
Im done now, im not starting a fire here just stating my beliefs and some facts. Thanks