Glider, I think you missed my point. When I read this study it makes me believe Mobil One V Twin is a better choice. I believe if you factor "we did the analysis on our product and others" into the mix then I suspect Mobil one and others are as good or better, appears many choices are close.
I only use Amsoil because I get a huge discount and last few cases were Free and no I am not a dealer. Friend has a commercial account at the local supplier. He gets oil cheeper than dealers do. I also believe it is a very good product in spite of the hype.
I am in a posting war with makers of Startron/Soltron on the Boat US site. THey make an fuel additive that has many claims which I believe to be complete bull. There is no way a couple ounces of magic juice will improve fuel economy on an already clean engine or new engine.
On that web site they allow select vendors to partake in general forums, some of these guys disguise themselfs with various screen names. One thing is consistant is they are usualy a new member and onty posts they have are about the product they are supporting/pushing. Fact is that other members an I called BoatUS on the carpet about this practice, no real response from them.