Factory Fill 15W-40, 27 hours, 2021 Kubota M7060 Tractor, V3307-CR-TE4 Engine, 27 hours

[TXHunter]

Interesting one here, I have no idea what oil the dealer installed in this thing but I don't believe it was 15w-40 HDEO. Super low hours (27h) but oil was in the unit since it was purchased in Oct 2021 so I wanted to flush that out, get a baseline, and develop our moving forward strategy. Now that I'm taking over maint for this unit, we have a plan to run monthly and will get heavier usage this fall while shredding a 50 acre klein field.

Any idea what factory fill they used here? Rotella T4 15w-40 was what went back in. Below are the results from the first sample sent to OAI.

Make/Model: V3307-CR-TE4 Diesel Engine
Vehicle: 2021 Kubota M7060 Tractor
Oil Filter: Kubota HH1C0-32430 (Replaced with Wix 57430 during OCI)
Location of use: Brady, TX
Sump Capacity: 12 Quarts

OIL FF 15w-40
MILES IN USE 27 hours
MILES ON UNIT 27 hours
SAMPLE TAKEN 7/21/25
MAKE UP OIL 0

IRON 5
CHROMIUM 0
NICKEL 0
ALUMINUM 2
COPPER 8
LEAD 0
TIN 0
CADMIUM 0
SILVER 0
VANADIUM 0
SILICON 14
SODIUM 7
POTASSIUM 164
TITANIUM 0
MOLYBDENUM 159
ANTIMONY 0
MANGANESE 2
LITHIUM 0
BORON 177
MAGNESIUM 11
CALCIUM 2860
BARIUM 4
PHOSPHORUS 432
ZINC 486

Fuel Dilution 1.8%
Soot <.1%
Water % <.1%
Visc @ 100C 9.8
TBN 8.49
Oxidation 5
Nitration 6

Lab comments:
Maintenance indicated at time of submission, no further maintenance action is required at this time. However, Viscosity is SIGNIFICANTLY LOW. Causes include contamination, incorrectly identified viscosity grade, or adding a different viscosity grade to the component. Increased component wear possible. Lubricant and filter change acknowledged.

 

[kschachn]

Oops, never mind I see it was OAI. Do you know what ASTM method was used to measure fuel dilution?

I agree with their comments as to the cause.

 

[TXHunter]

It shows ASTM D7593 was used.

 

[kschachn]

It shows ASTM D7593 was used.

That should be an accurate method.

 

[nwjones18]

Man that thing has been sitting! First oil change on my tractor was at 5yrs/125hrs but I didn't do a UOA. I've been running 15w-40 delvac in mine. No comments otherwise but good on you for changing it. Can always spot a kubota that hasn't been serviced by the grey filters still being installed..

 

[tnt_motorsports]

If I had to guess it was a factory fill of HDEO 10w-30, and maybe even a break in oil. With a little fuel dilution, it dropped to a very thin -30 weight oil.

 

[TXHunter]

Calcium and Moly seem too high IMO for a break-in oil. But on the flip side I would have thought ZDDP would have been higher even for a 10w-30 HDEO. Regardless I'm glad that stuff is out of there.

 

[fantastic]

No way that was 15w-40. I agree with @tnt_motorsports.

 

[fantastic]

Calcium and Moly seem too high IMO for a break-in oil. But on the flip side I would have thought ZDDP would have been higher even for a 10w-30 HDEO. Regardless I'm glad that stuff is out of there.

Yeah, that P and Zn is low. Can you ask them to rerun it?