Kubota oil

kcs

Member

Equipment
Kubota B2650
Jan 9, 2021
72
9
8
Virginia
I have a quart of Kubota 15W40 oil. I want to start using Rotella 15W40. Would it hurt any thing to mix the two. Thanks
 

hodge

Well-known member
Lifetime Member

Equipment
John Deere 790
Nov 19, 2010
2,648
99
48
Love, VA
It won't hurt to mix them.
 
  • Like
Reactions: 1 users

Mark_BX25D

Well-known member

Equipment
Bx25D
Jul 19, 2020
761
446
63
Virginia
I have no idea where this old idea came from that you should not mix brands. There has NEVER been any problem with it. Brand or weight, it doesn't matter. As long as the oil is compatible with your engine, just use it.
 
  • Like
Reactions: 2 users

GeoHorn

Well-known member
Lifetime Member

Equipment
M4700DT, LA1002FEL, Ferguson5-8B Compactor-Roller, 10KDumpTrailer, RTV-X900
May 18, 2018
3,603
1,433
113
Texas
It will make the air in your tires smell like rubber.
 
  • Haha
  • Like
Reactions: 5 users

Pau7220

Active member

Equipment
L3650 GST, Landpride TL250 FEL w/ Piranha, 6' King Kutter, GM1084R Finish
Aug 1, 2017
669
209
43
Scranton, PA
I have no idea where this old idea came from that you should not mix brands.
Someone posted a pic right out of the Kubota owners manual. I’m sure it will resurface now.
Agreed…. it’s a non-issue.
 

SDT

Well-known member

Equipment
multiple and various
Apr 15, 2018
2,483
525
113
SE, IN
I have no idea where this old idea came from that you should not mix brands. There has NEVER been any problem with it. Brand or weight, it doesn't matter. As long as the oil is compatible with your engine, just use it.
It's a vestage of the 50s and early 60s when it sometimes did matter.
 
  • Like
Reactions: 1 user

RalphVa

Active member
Jan 19, 2020
579
227
43
Charlottesville
Ralph, I miss the point for your thoughts. Was is the "goo" your refer to? What is "but not that" referring to?
It's goo in cold starts. Cranking speed is 60-70% slower than almost any other oil. The valve train is likely smoking underneath the valve cover by the time oil gets up there.
 

Pau7220

Active member

Equipment
L3650 GST, Landpride TL250 FEL w/ Piranha, 6' King Kutter, GM1084R Finish
Aug 1, 2017
669
209
43
Scranton, PA
I’m sure it will resurface now.
Consider it resurfaced…. It was in my owners manual.
I’ll restate I am NOT in agreement with it.
D53F41F9-EAA1-494F-B08E-CD9474E4FF0B.jpeg
 
Last edited:

Pau7220

Active member

Equipment
L3650 GST, Landpride TL250 FEL w/ Piranha, 6' King Kutter, GM1084R Finish
Aug 1, 2017
669
209
43
Scranton, PA
It's a vestage of the 50s and early 60s when it sometimes did matter.
Interesting thought process even though this was printed in June, 2002
And printed in the USA 🇺🇸
image.jpg
 

WoodKutter

Member

Equipment
L4600 John Deere 750, John Deere 420
Apr 15, 2022
52
34
18
Vermont and Northern Maine
It's goo in cold starts. Cranking speed is 60-70% slower than almost any other oil. The valve train is likely smoking underneath the valve cover by the time oil gets up there.
Your in Virginia! You don't even get cold weather! Block heater and 20 or 30 below not a problem.
 
  • Like
Reactions: 1 user

lmichael

Active member

Equipment
Kubota G2160
Apr 23, 2021
281
120
43
Rockford IL area
If you're trying to "stretch" the capabilities of an oil you don't want to mix it with another brand or even a different formulation from the same company. As it will revert to the lowest common denominator
 

dlsmith

Well-known member
Lifetime Member

Equipment
BX2230, LA211
Nov 15, 2018
971
409
63
Goshen, IN
It's goo in cold starts. Cranking speed is 60-70% slower than almost any other oil. The valve train is likely smoking underneath the valve cover by the time oil gets up there.
If it's 15W at 25-30°, I would hardly consider that "goo." As far as 60-70% slower cranking speed, I've never noticed more than a small decrease in cranking speed when cold, and a lot of that would rightly be attributed to loss of cranking capacity in the cold soaked battery. As for the valve train smoking until it get oil, that's just an absurd statement.
As I stated, I've run RotellaT 15-40W in my JD430 with a Yanmar 3TNA72UJ since I bought it in '93, and it's doing just fine, so I think I;ll continue to take my chances with the "goo."
 
  • Like
Reactions: 1 users

RDinNHandAZ

New member

Equipment
Kubota BX1870-1, FEL, BX5450 Snowblower , RCK48 mower, back blade, weight box
I just changed my BX1870’s oil at 85 hours as the tractor is a recent purchase. Prior oil change was in 2018 at 35 hours by the PO. I did Delo full synth 15W40. As a test I put a sample in my 0º freezer and in a few hours pulled it out to find it thicker but not by much. Sort of like 30W straight oil at 70º. I plan to see if it is a problem this winter but the manual says it is OK. Does that qualify as GOO?
 

lmichael

Active member

Equipment
Kubota G2160
Apr 23, 2021
281
120
43
Rockford IL area
Yeah, kinda out on a limb there. Years ago wife and I went to MN for thanksgiving and I had not had time to change the 15-40 M1 I had in the crankcase of my truck (old Ford F150 with 300 cu in straight 6). Temps here were in the 50s/60s and we got there and temps dropped well below 0. It cranked up just fine. My guess is today's 15-40 full synth will flow much easier than yesterdays non synth 10-30.