Generator Oil Change Frequency
The gen set in my Thor Challenger is an Onan QG 5500 Gas. The RV manual says change the oil every 150 hours. That seems pretty frequent. If boon docking when it is hot we could do that many hours i...
Forum Discussion
Onan dealer/cert. tech here 30 + yrs. As OP's have said, oil is cheap.
150 hours on your genny is equivalent of 6000 miles on your vehicle.
And remember, this is basically a lawn mower engine. So yes, Onan says 150 hr,or annually, but personally, I do 100 hrs or less on gasoline;
150 hrs on diesels. In my part of country (Southeast), 15W-40 works great year round for both air cooled gasoline units and diesels.
150 hours on your genny is equivalent of 6000 miles on your vehicle.
And remember, this is basically a lawn mower engine. So yes, Onan says 150 hr,or annually, but personally, I do 100 hrs or less on gasoline;
150 hrs on diesels. In my part of country (Southeast), 15W-40 works great year round for both air cooled gasoline units and diesels.
