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
twodownzero wrote:Gulfcoast wrote:
Apparently, Valvoline Premium blue is recommended by Cummins, as it has their logo on the jug.
That's what I use now. Used to use Rotella T6 but it's no longer rated for gasoline engines and I use the same oil in all of my vehicles.
I also use it because I can get three gallons on Amazon for $55-65. That is the premium blue extreme full synthetic 5W-40.
T6 0W40 is still SN rated. Appears 5W40 isn't gas engine rated, idk when or if it changed.
