The invoice gives a number (68055890AA) for the oil used at my local dealer no specific type or brand mentioned, I did some research on the web and the only thing I can find is that it is a number for bulk oil used by dodge dealers, I was hoping to get some more info, I'll call the dealer but was wondering in anyone might be able to help, the truck uses 5w-20 so I thought maybe this number was for bulk mopar oil 5w-20? (don't know who makes it.) Thanks for the help.