ChrisAU
War Damn Eagle
I've always ran 10W-40 dyno oil in all the 400's I've had, but I'm contemplating going to 20W-50. The only reason being that the truck isn't driven much, and the thicker oil should coat better before draining (is my thinking right on that?), and that my oil pressure is a little low for my liking after warm up haha.
I like to use Valvoline High Mileage btw. On my Tahoe it's Mobil 1 Full Synthetic 5W-30.
I like to use Valvoline High Mileage btw. On my Tahoe it's Mobil 1 Full Synthetic 5W-30.