Cummins onan oil change
I have brand new toy hauler with new Cummins onan 4000. Is the first oil change at 25 hours then every 100 hrs thereafter?
Forum Discussion
I believe the owners manual will advise as to the correct Oil Change interval. Ours is a 5500 and the interval is at least 150 hours. Make sure you follow the recommended interval and use the recommended oil grade. Don't forget to change the filter each time as well. Our oil grade is 15W40 as recommended for the North American climate.
