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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...
punomatic's avatar
punomatic
Explorer
Jul 01, 2018
ksg5000 wrote:
If memory serves me correctly Onan service guys use Rotella - I use that if it's available. Not a big believer that brand means much so long as you change your oil on a regular basis.
I once asked my mechanic what oil I should use in my pickup. He said, "Anything but Pennzoil." Interestingly, I had been using Pennzoil in my Chevy 454 MH, when the engine blew. Coincidence???

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