Genny oil
I have a 2010 Damon Challenger 368 on an F-53 chassis. My Cummins generator calls for 15W-40 oil. Went over to Napa and picked up 2 quarts. Got it home and noticed on the label it said "Heavy Duty...
Forum Discussion
You're all set with that heavy-duty 15W-40 oil. I've got a 2011 Georgetown on the same F-53 chassis, and I’ve been using the same type of diesel oil in my Cummins generator for years without any problems. The extra detergents in the diesel oil can actually help keep things cleaner.
