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
06 as well 198,980. has had valvoline blue 15 40 since first oil change. Doesnt use a drop of oil. Had valve cover off last month. Looked good to me.I change oil every 7000 to 7500 miles
