Onan 4 KW Generator oil?

agesilaus, I'm very sorry. I misread your reply. I'm THE Idiot. Sorry and thanks.

enblethen wrote:
I have been running Valvoline motorcycle 10-40. I carry a spare quart. Available at most Walmarts.

i wouldn't be doing this, this oil is designed for wet clutches, thus has no friction modifiers.

jolooote wrote:
agesilaus...I stated in my post that "I LOST THE MANUAL" and I'm asking for "SUPPORT" here. LOL... ghaaa... If YOU have no support to offer please go help elsewhere? lol

Ummm...agesilaus provided you with a link to an electronic copy of the manual, something like the one you no longer have. That sure sounds like offering support to me....

If the temperature is not below freezing, SAE 30 (single grade) oil is recommended. SAE 10W-30 or 10W-40 are both acceptable for the temperature range of 0° to 100°. (That is according to the document that was kindly linked.)

Edit: mixing grades of oil is not problematic, and you end up with something with intermediate properties. It's rarely worth the effort to try to do it intentionally, though.

agesilaus...I stated in my post that "I LOST THE MANUAL" and I'm asking for "SUPPORT" here. LOL... ghaaa... If YOU have no support to offer please go help elsewhere? lol

Can I mix 15w-40 and 10w-30?

Did you check Amazon for 15-40 oil?

I have been running Valvoline motorcycle 10-40. I carry a spare quart. Available at most Walmarts.

Manual: Manual

or: Support