Oil change question L4400

[aaluck]

Okay I purchased this tractor about a year ago, used. When I brought it home I changed the oil...along with a lot of other things. I purchased the oil from the dealer And didnt think anything about it. I just changed again today and here is my question.

I knew I had some left over Kubota oil I wanted to use and when I got it down I realized that the Dealer sold me Kubota oil 15w-40. The manual clearly says SAE 30 or 10w-30/40. I purchased Rotella 10w-30 for this oil change. Any idea why the dealer sold me the ‘wrong’ oil? What should I be using? Does it make that much of a difference? Can I mix the two as to not waste 3+ quarts of the Kubota oil?

 

[Roadworthy]

I have an L2501 - 2019 model. The manual says to use 15W-40 above (I believe) 14 degrees F or something like that. I can use 10W-30 at pretty much all temperatures. Many people use 15W-40 all the time which may explain why you got what you got. I suspect you'll run into no problems mixing them if the only difference in their specifications is the weight. There are usually other letters on the container telling what SAE specifications the oil meets. Just be sure all are diesel rated.

 

[GeoHorn]

You were not sold the “wrong oil”. Read the owner’s manual and you will see that what you were sold is appropriate depending upon climate.

 

[UpNorthMI]

As others commented, you can use 10w -30 or 15W-40, I would not recommend that you mix the 2 different grades of oil.

 

[Pau7220]

Can I mix the two as to not waste 3+ quarts of the Kubota oil?

Yes, you can safely mix the two oils as long as they are both diesel rated. Both are petroleum products that will blend without issue.

 

[lugbolt]

Quit worrying about viscosity. Dump what you have into it, it'll run for decades with it.

people put way too much thought into it, which is why forums and discussions turn into oil wars.

 

[aaluck]

You were not sold the “wrong oil”. Read the owner’s manual and you will see that what you were sold is appropriate depending upon climate.

Not to dicker but here is the manual. There is nothing in there about 15w-40. However from the other comments I take it it doesn’t matter.

 

[Pau7220]

I don't know when Kubota started packaging 15w-40.. that may be the reason. They also list 10w-40 as acceptable which is one of the worst weights you can use in conventional grade due to the large amount of viscosity improvers. There are many of us out here running 5w-40 Rotella T6 in just about everything we own... gassers, cars, trucks, motorcycles, Kubota and all other light and heavy diesels. Don't worry, you're safe.

 

[Mark_BX25D]

Here's the best advice you'll ever get on engine oil:

Use it.

Here's the second best advice you'll ever get on engine oil:

Change it regularly.


All the rest of the oil war discussions are waaaay behind these two in importance, no matter what the Amsoil salesman tells you.

Yes, of course, you should try to follow the manufacturer's recommendations. But don't sweat it if you are not exactly right. It's not going to kill your engine.