The point was that if you belive all of the marketing crap behind AMSOIL or even Royal Purple, you are a fool. For example, Mobil 1 EP is an ester based oil, as is AMSOIL and RP. The same wear numbers and similar TBN's prove that the pricey "boutique" oils are NOT any more suited for wear protection or even deposit protection.
Any oils meeting the API SN or SNPLUS rating, as well as ILSAC GF-5, are excellent oils and the main differences between them is how LONG you can go for an OCI.
Remember folks: The best oil filter is a good air filter. (And don't buy a KN gauze garbage filter!)