Not saying Amsoil is a bad product but I guess I'm just skeptical of any claims that it is measurably better than any other synthetic oil with the same API and JASO-MA ratings that is on the market. From what I've read all the synthetic oil manufactures, including Amsoil, use the same base oils and the only real difference between brands is they all have their own recipe of additives. About the only difference between Amsoil and other similar products as far as I can tell is they use a multi level marketing scheme like Amway.
Anyone remember oil additives like Slick 50? They used to make claims about making your engine last longer and get better mileage until they got taken to court and could not prove it.
Last edited by Sprocket; 09-01-2012 at 11:48 AM.