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DAS26miles's avatar
DAS26miles
Explorer II
Jul 01, 2018

Onan 4K needs oil change, which oil brand and SAE

My Onan 4K is about to need the 150 hour oil change. Last service was thru an authorized service dealer and I know it was expensive. I used to use Pennzoil 30 in my Winnebago as I don't travel where...
suprz's avatar
suprz
Explorer
Jul 01, 2018
I use Rotella 15/40 that's what the rv dealer used when I picked up the RV and just changed the oil and again used the same. Ive used the generator in temps ranging from the 20's to the 100's never a issue

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