We almost agree again. I've always followed SS recommendations. Being born and raised in NY everything we owned fell into SS categories. Just ride on the LIE, GCP, or Southern State on a beach day during rush hour and you'll see why. Forget the commute into NYC. The odds of us having an oil related engine failure are slim to none.
My comments are hypothetical, but could become reality. IMO any oil company will look for an out, Amsoil is no exception, and has one other strike against it, the API starburst for their high end products.
My father taught me to follow recommendations, use what the mfg, "suggests", it will keep me out of trouble. Why hassle the MM act? The only one who benefits from that is a lawyer. Risk to reward ratio tells me to follow recommendations. Now if I was making a living selling Amsoil, I'd have a different view. I don't sell it and won't sell it.
BTW the tone of this recent discussion is refreshing!