Originally Posted by M45
page two mentions the different classes of oils at the very least. they are mentioned other places as well. i guess the point is that they do in fact have guidelines for class IV and V oils.
The Amsoil site does have listings, as well as the site below:
: API SN (Resource Conserving), SM…; ILSAC GF-5, GF-4…; ACEA A5/B5, A1/B1; GM 6094M; Chrysler MS-6395