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
I'd recommend that you check for the required API ratings in your generator manual and then compare to the oil you bought. That should address any concerns that you have. Valvoline's 15W-40 Premium Blue One Solution Gen2 Heavy-Duty Diesel Engine Oil, for example, is for diesel, gas, and NG engines, and would likely fit the bill if your oil isn't meeting the requirements of your generator.
