If I had no other choice than to use one engine oil year round in all manner of weather, I think I would select Exxon's (Esso in Canada) XD-3 0W40.
Why? It is API CI-4/SL, and also beats the above 76 stuff at both ends of the temperature scale.
edit: Besides to stay on topic, Buster thinks he needs some sort of exotic PAO or ester engine oil, which XD-3 is a blend of, and 76 may not be.
[ December 26, 2003, 10:08 PM: Message edited by: userfriendly ]