If any of you would really like to learn about lubrication and additives, a good place to start is Lubrizol, the world's largest additive manufacturer at
http://www.lubrizol.com/
Select the "Knowledge" menu option - the last two subjects are most pertinent. It stops short of an ultimate recommendation because none is possible - the oil stock and additive packages vary so much that you cannot generalize a whole lot.
Seems like Bart Carter reading material to me
