Onan 4 KW Generator oil?

jolooote wrote:
Can I mix 15w-40 and 10w-30?

yes.. it doesnt care or matter. both oils, either individually or mixed will work well at the "normal" extreme temps here in the US...

I am all screwed up!
What I have now in genset is Castrol GTX 10-40.

Sorry, I slipped down a paragraph. It should be SJ-SL or SM
I will need to check MH for the oil I have. I know it is not standard motor oil.

enblethen wrote:
Here is spec sheet for oil. I also see it is good for wet clutches.Spec sheet Valvoline Motorcycle oil
My genset is gas fueled!

yes its the same sheet i linked, CJ is a diesel rating? nor is it listed. guess im missing where your getting your info

Here is spec sheet for oil. I also see it is good for wet clutches.Spec sheet Valvoline Motorcycle oil
My genset is gas fueled!

jolooote wrote:
I've always used 15W-40 oil in my 2014 Onan 4 KW generator because of its wide temperature range as the manual said. Lost the manual. That oil has BECOME HARD TO FIND LATELY. What grade of oil can I switch to down here in Miami, Florida summers? Thanks :@

Chevron DELO 400 15W-40 and/or Shell Rotella T 15W-40 and/or Mobil Delvac 15W-40 are three of the most common/popular economically priced diesel engine oils which will meet all the specifications for your Onan gas genny. They are widely available in quarts or gallons. I suggest you try a different source. Walmart, Costco, Target, Kmart, O'Reily, NAPA, etc. all carry it, . . . normally. Please lets not get into a gas/diesel oil discussion here. I know that 15W-40 is typically oil specified for diesel engines but it IS what ONAN recommends (that's what comes in the bottle with ONAN's name printed on it) for their gas engine gennys for non arctic use.

Chum lee

enblethen wrote:
Wet clutches normally are lubricated by transmission oil.
The 4 cycle motor cycle oil is API rated CJ which is listed by Onan as good.

none of my honda's are, they all share motor oil.

click

not sure where you see a cj rating for this oil? why are you using this for a diesel engine?

Wet clutches normally are lubricated by transmission oil.
The 4 cycle motor cycle oil is API rated CJ which is listed by Onan as good.

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

Not a problem, I've done it myself. But I try to keep the vituperation down with that knowledge in the back of my head...heh.

DrewE, thanks 4 that info. The crankcase holds 1.6 qts. I still have half a qt. of 15w-40 left and lots of 10w-30 so wondered if its a problem to mix em.