What? No 15-40?

[hrcarver]

I'm a new kubota owner, so while browsing through the manual I saw something that struck me as absolutely bizarre.

It said to run car oil (sae 20 or 30, 10-30) in a diesel? Why? Never heard of anything like that.

 

[bp fick]

My Kubota does mention the 15w-40 and 10w-30, but not the common 5w-40 typically found in synthetic.

Hard to believe a diesel rated oil isn't intended for your M.

 

[Diamondpilot]

My Jinma says to use SAE 30 in its 28HP diesel engine. I did this for the first 500 hours then switched over to 15W40 oils.

Funny thing is it also recommends SAE 30 for the front axle, transmission, and hydraulics. I used it for about the first 250 hours at which time I changed the front axle and gear box to 80W90 gear oil and the hydraulics to a AW32 Hydro oil.

I contribute simplified oil recommendations on it because its Chinese and decent lubes are much tougher to get in the Rice Paddys over there. Heck, they say to put clean stream water in the radiator and to remove it if temps are going to drop below freezing. I run anti-freeze/water mix in it since day one.

Chris

 

[bp fick]

Kubota sells the following oils at their dealerships.

15w-40, 10w-30, 30w all diesel rated. Those are your choices.

Kubota Tractor Corporation - Parts | Kubota Lubricants

 

[Soundguy]

did it actually spec a 'S' rated oil.. or a 'C' rated oil.

in cold-er areas, 10w30 C rated oil is more common.

soundguy

 

[hrcarver]

The engine is a V3307-DI. (4cyl diesel)

It says.

Engine oil: API Service Classification CD, CE, or CF (no idea what any of that is).

above 77 degrees: sae 30, sae 10w-30 or sae 10w-40

32-77 degrees: sae 20, sae 10w-30, or sae 10w-40

below 32 degrees: sae 10w, sae 10w-30, or sae 10w-40.


It looks like 10w-40 is the closest I can get to 15w-40, since I run both below 32 and above 77. Is any 10w-30 or 10w-40 off the shelf diesel rated or is there some special about it?

 

[Jimbrown]

"Engine oil: API Service Classification CD, CE, or CF (no idea what any of that is).
"

And that is the problem. You need learn what those letters mean.

CD,CE, CF are diesel rated oils designed specifically for diesel engines.

Most of the shelf oil is S rated and designed for gasoline engines. It ain't the same. Might wat to do some lokkin/ here is one place.

Motor Oil Grades and Service Ratings

 

[Jerry/MT]

I'm a new kubota owner, so while browsing through the manual I saw something that struck me as absolutely bizarre.

It said to run car oil (sae 20 or 30, 10-30) in a diesel? Why? Never heard of anything like that.

SAE 30, 10W30 etc are viscosity ratings.

What API service classification does the owners manual recommend? Most gas engines us S series API service classifications while most diesels use C series serviceclassifications. Some oils have both S and C ratings. Make sure you are using the correct API rated oil in your tractor as well as the correct viscosity rating.

 

[wny770]

Car oil? I run Rotella 10w-30 Diesel rated oil in my NH tractors... It says "car oil"? That's strange.....

 

[rcurrie]

S stands for spark ignition, C stand for compression ignition.