dpbrowne,

You neglected to point out which site you copied that blurb from; but, a quick google search revealed quite a few sites displaying the same message.

As someone already pointed out, Amsoil is a lot like Amway. The distributors are relentless in getting you to buy their product, have all kinds of research and studies to show you, and would love to set you up as a distributor.

I'll stick to buying my oil at Costco.