Diesel Oil.....
2006 Cummins 5.9 - 150k miles. I know nothing about this 5.9 that I just bought, except it really runs good. I've always used Delo 400 in diesel engines, what do you prefer and why? Thanks
Forum Discussion
I use whatever is on sale, but mostly Valvoline blue. The important part is that you maintain the truck, not which brand of oil you use. IMO
