Rotella 10w40.

Unless you have a mutant 6Ve, you will burn a quart every 600-1000miles after the first 1000 of your oil change.

Catepillar Tractor honors their warranty on their $60k engines with Rotella.

It's cheaper than Mobil, Amzoil and the purple stuff. Don't forget that any oil is better than no oil.

Raybob: