Diesel Oil.....

Gulfcoast wrote:
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

In the 2001 ran Delo 400 Dino oil, 10,000 mile changes, safe per BlackStone TBN testing. Could have gone more miles, 10K was about a year, so good timing. Fleetgaurd filters.
Replaced tappet cover gasket at 298,748 absolutely clean inside.