Just stumbled across this gentlemans site (He is a Certified trainer for GM, Ford, Chrysler and ASE Certified Tech) and though I would share. Engine Oil presentation is about 1/2 down the page. Surfing around his site, there is some good information on there for general auto repair.
I'll leave the debate on the oil presentation for others....
Linky
I'll leave the debate on the oil presentation for others....
Linky