My gen's oil is 2 seasons old now. Previous owner told me it was changed shortly before I bought the boat, so I figured I'd change it after this season. I've done my due diligence to ensure proper levels and appearance, so don't shoot me for not changing it already.

It's getting time to start watching the low temperatures in the forecast and thinking about winterizing it. Should I change the crankcase oil before winterization or at the beginning of next season?

BTW, my boat has Honda 4 stroke outboards, which don't require any winterization. I think I may buy some engine covers for them though, as i don't want anything building nests in the air intakes.