Forum Discussion

whs9841's avatar
whs9841
Explorer
Oct 16, 2014

New Onan 5500 gen - oil change and air filter questions

I have a new Fuzion 331 with an Onan 5500 gas generator (I believe it is model HGJAB). I just used the trailer to dry camp last weekend and ran the generator all weekend. I need to change the oil, o...
Ductape's avatar
Ductape
Explorer
Oct 22, 2014
Good choice.
For mine I went to 5W40 synthetic Rotella at the second oil change. I have spent a lot of off grid time with portable generators over the years and in my experience synthetic for air cooled engines pays dividends in reliability and fuel use.

YMMV.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,277 PostsLatest Activity: Jul 02, 2025