Orange product names are Amazon affiliate links (we may earn a commission at no cost to you). Label ratings are what the oil maker prints, not a Kubota approval.

Kubota USA lists these two parts but, in the pages we read, does not print an API rating for either one. An official safety data sheet identifies the 10W-30 as SAE 10W-30 engine oil (product code KU10200). Other genuine sizes may exist, so ask your dealer. We removed the “$133–154 per pail” price from earlier versions because we could not source it.

That is the wording of the 2025 warranty guide, not a ruling on any claim or on an older tractor. We did not find a Kubota statement that using a non-Kubota oil brand voids coverage by itself, and none that every alternative oil is acceptable. Earlier versions of this page said the warranty “remains valid” with any oil that meets the specs. Keep your receipts and service records, and ask your dealer before relying on any oil for a tractor under warranty.

These sources disagree for non-EGR engines. The BX manual we read is copyrighted 2016 and prohibits CJ-4, while the Kubota USA webpage lists CJ-4 and carries a May 2012 note. We cannot say which one controls, so we do not pick one. For the B2301/B2601, B2650, L2501, L3901, M5-111 and M7060 we did not find the API page. None of the manuals we read mention CK-4, which does not mean no Kubota manual does. See our oil change interval guide for intervals, capacities and viscosity tables.

The ppm values for Chevron are our conversion of the published mass percentages. Shell does not publish zinc or phosphorus on the sheets we read. The Valvoline and Delo data are for the Premium Blue One Solution Gen2 15W-40 and the Delo 400 XLE SB 15W-40 Synblend, so confirm that the product name on your Amazon listing matches before relying on the row.

Synthetic oil: we found no model-specific manual statement allowing or prohibiting it. The Rotella T6 5W-40 is a full synthetic, so that note applies to it. We also removed the “Do NOT use CJ-4 in Tier 4 engines, always use CK-4” advice, which conflicts with the L4701 and MX5400 manuals.

Kubota describes Super UDT2 as “a multi-purpose all-weather hydraulic fluid… specifically recommended for use in the Kubota hydraulic, final drive, transmission, differential, and wet brake systems,” and “fully interchangeable with standard UDT and Super UDT fluids.” Kubota also describes friction characteristics for smoother starting, drive control and PTO connection. Its page names “transmission” rather than “HST,” so check your manual for your drive type. We found no Kubota statement approving engine oil in these systems.

Package wording is Kubota’s, so “12/1 Quart” means a case of twelve quarts. More fluid specs are in our transmission fluid cross-reference.

JASO MA and MA2 are classifications aimed at four-stroke motorcycle engines with wet clutches. We did not find a JASO requirement in the Kubota manuals we read, so the viscosity and API class in your operator’s manual are what to match.

• The API rating of Kubota genuine oil 70000-10005 and 70000-10200, and any current price.
• The API page for the B2301/B2601, B2650, L2501, L3901, M5-111 and M7060, and any CK-4 mention in a Kubota manual.
• Whether a non-Kubota brand affects a warranty claim, and whether CJ-4/CK-4 oils that also list CI-4 are acceptable in a BX.
• Any manual statement on synthetic oil, and Shell’s zinc and phosphorus figures.
• The Premium Blue 15W-40 and Delo 15W-40 data match your exact Amazon listing.