Whats so special about Onan generator oil
Just doing a service on my generator (5500 Marquis model 5.5HGJAB-1038D). Bought plugs and filter, but they wanted $15 a quart for the Onan SAE 15W-40. Thought maybe I could just get it cheaper at an ...
Forum Discussion
The only thing special about Onan brand motor oil is the price... it's never on special. It's the standard "bend over and take it dry, with sand" pricing of any relabeled product.
