Following a line from the Dexos Gen 2 thread, here's something I didn't know:
http://www.imakenews.com/lubritec/e_article003516413.cfm?x=b11,0,w
And then this:
http://www.calumetspecialty.com/products/branded-products
http://www.imakenews.com/lubritec/e_article003516413.cfm?x=b11,0,w
And then this:
http://www.calumetspecialty.com/products/branded-products