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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...
theoldwizard1's avatar
theoldwizard1
Explorer II
Jul 01, 2018
DAS26miles wrote:
I used to use Pennzoil 30 in my Winnebago ...

Modern multi-viscosity oils (10W30, 10W40, 15W40) Are MUCH better than any single weight oil ! Brand really does not matter as they are all tested to meet the API standard.

suprz wrote:
I use Rotella 15W40 that's what the rv dealer used when I picked up the RV and just changed the oil and again used the same.

That is what I wpuld use also.

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