First let me say a few things. SOME PAO's Amsoil uses to formulate their own oils are purchased from Exxon Mobil - big whoop, common knowledge. (Read: Amsoil's own formulations). Amsoil buys from a variety of sources to make their oils. This does NOT mean they are the same as Mobil 1.
First post? You are forgiven.
Stay here and learn, then go straighten those guys out. So many automotive web sites, such poor knowledge dissemination.