I'm late to the game here, but I actually started a thread just like this about 5 years ago or so.... And since then, my choice has changed.
Five years ago, I chose HDEO 15w40. It is great in all my motorcycles, small engine and diesels. It would be just fine in my Jeep, FJ and Ford 7.3 gas.
Today, I think I have changed slightly... My WalMart started carrying Shell Rotella T6 10w30 and I think that is my new choice.
........