http://api-ep.api.org/filelibrary/AP...Guide_2004.pdf
Old subject but the specs on the back of the container tell it all. That is, . . . if you know how to read the specs and the link explains how and what the letters stand for. When it comes to the weight and brand you use, . . read the owners manual, to each his own and the link will help you make a more informed decision.
You still see "SA" grade oil on store shelves and for the modern engine that is a definite BAD, BAD, NO, NO!

An article I read said it's good for oiling door hinges.
http://www.imakenews.com/lng/e_artic....cfm?x=b11,0,w