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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Having RV issues? Connect with others who have been in your shoes.24,362 PostsLatest Activity: Mar 02, 2026
