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 ...
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For modern Onan models which use splash lubricant, I'd just go with a good synthetic, and call it done. I like using synthetic in generators because the oil can handle being thrown around in the crankcase (and the amount of heat and friction such a relatively small amount of oil has to handle.)
