02-21-2014, 10:53 AM
Forest there is a metal tag next to the fuel filter that tells you what to use. I have always used 15W40 in every diesel I've ever owned. I used Shell Rotella 15w40 in my Cat and in my Cummins. Cat said install filter dry, Cummins said fill them and Detroit does not say, that I can find.
Chappell and Mary
2004 Foretravel 36 foot