I've been avoiding Amsoil products because of their marketing tactics. I think they make good products but they're normally over priced in my opinion. The people that recommend them would probably bathe at night and drink it in the morning instead of that underperforming generic coffee if that was an option.
Here is a comparison between newest Asin ATF and Maxlife/Amsoil.
Maxlife is 5points higher viscosity with Amsoil being 3 points lower.