A trick I learned from a Mercedes Benz mechanic is to put about a pint of ATF in and run it until it's warm then shut it off and drain.

I'm a Rotella fan when it comes to my diesel pick-up.

“You never need fear a man, no matter what his size. When danger threatens, call on me, and I will equalize.”
Samuel Colt.

�Common sense is genius dressed up in work clothes.� - Ralph Waldo Emerson