Forum Discussion
mlts22
Mar 03, 2014Explorer II
Assuming it is like 10W30, so you have the same winter/summer weights, it doesn't really matter. I prefer full synthetic because the Onan is splash-lubed, so oil does a lot more "work" than in a pressurized oil setup.
Of course, the oil described in the manual is the minimum.
Of course, the oil described in the manual is the minimum.
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