Genny oil
Is synthetic oil a good idea for my 5.5.kw generator?
Forum Discussion
That's what I've always used in our Onan, I certainly wouldn't be RVing if I couldn't afford a couple quarts of synthetic oil for our genny. Of course it's not required by Onan, as maintenance costs go their Onan oil is not all that much cheaper than synthetic oil off the Walmart shelf.
