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Old 12-04-2023, 06:10 AM   #1
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Generator Oil ........

The last time I changed the oil in my generator on the Greyhawk I put 30-W oil in it which is recommended for temp. down to 30 degrees. However once a week I start and run the generator for approx. 15 minutes. Now that the temps. here in Ohio have dropped down into the 20's and 30's I'm thinking that I should have used the 15-w-40 oil also a recommend oil for temps below 30 degrees. Was curious as to what weight oil do most use in their generators.
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Old 12-04-2023, 08:52 AM   #2
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My old Kohler manual said 30 weight or 10w30. But I would look up your brand and model and look in the manual for it or a seller of that brand.
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Old 12-04-2023, 09:00 AM   #3
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Lots of posts on this

Stick to what the manual says
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Old 12-04-2023, 12:35 PM   #4
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Stick to what the manual says
+1

And I think it was craigav that did some research into what's in Onan's branded oil too. IIRC, Amazon sells it.
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Old 12-11-2023, 07:06 AM   #5
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Quote:
Originally Posted by pconroy View Post
+1

And I think it was craigav that did some research into what's in Onan's branded oil too. IIRC, Amazon sells it.
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Old 12-27-2023, 07:37 PM   #6
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I use Onan 15w40 exclusively. Onan knows what is best for their warrantee/generators. just y use it and move on.
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Old 12-28-2023, 11:34 AM   #7
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Rotella T6 15W40. I'd use 5W40 if I did a lot of cold winter camping.
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Old 12-28-2023, 01:21 PM   #8
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I ended up using the Rotella 15W40, why?, our local auto parts carry's it. Now as suggested I'm moving on....
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