Kubota Engine Oil Cross-Reference: Rotella & Delo (2026)

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⚡ Quick Answer

Genuine Kubota 15W-40 engine oil (part 70000-10005, 5-gallon pail) runs about $133-154 at authorized dealers. Shell Rotella T4/T6, Mobil Delvac, Valvoline Premium Blue, and Chevron Delo are widely-used diesel oils that meet the same viscosity and API ratings at meaningfully lower cost. Match viscosity (15W-40 or 10W-30) and API rating (CK-4 or CJ-4) to your operator’s manual, and the warranty remains valid. For HST transmissions use Super UDT2 only — never substitute engine oil.

⚠️ Correction notice: An earlier version of this guide overstated the price of genuine Kubota oil, published incorrect capacities for several models, and mischaracterized the JASO MA/MA2 oil classification. This page has been corrected with verified pricing, capacities, and specifications.

A 5-gallon pail of genuine Kubota-branded 15W-40 runs roughly $133-154 at authorized dealers, depending on where you buy. Well-known diesel oil brands meeting the same CK-4/CJ-4 specs are often available for meaningfully less. This guide helps you match the right viscosity and API rating to your tractor without overpaying — and without cutting corners on real engine protection.

🔌 Key Specs to Match When Choosing Kubota Oil Equivalents

Viscosity grades: 15W-40, 10W-30, 5W-40, 0W-20 — match to your climate and manual
API ratings: CK-4, CJ-4, CI-4 Plus — CK-4 is backward compatible with all older categories
JASO MA/MA2: A motorcycle four-stroke wet-clutch oil classification — generally not relevant to Kubota diesel tractor engines unless your specific operator manual calls for it
Zinc (ZDDP): ~1,200–1,400 ppm typical in heavy-duty diesel oils for older equipment
Super UDT2: Kubota’s HST/hydraulic fluid — use a proper UTTO equivalent, never substitute engine oil

Genuine Kubota Oil: Verified Part Numbers & Pricing

Confirmed Genuine Kubota Oil Products

70000-10005 — 5-gallon 15W-40, confirmed via Kubota’s own OEM parts catalog (~$133-154/pail at authorized dealers)
70000-10200 — 1-quart 10W-30, confirmed via Kubota’s own model catalog
Other Kubota package sizes (1 qt, 1 gal, 2.5 gal, 55 gal in 15W-40) exist in Kubota’s catalog family — confirm the exact number and price with your dealer for the size you need

Popular Diesel Oil Alternatives

Product	Viscosity	API Rating	Typical 5-Gal Price
Shell Rotella T6 15W-40	15W-40	CK-4	$60–$80
Valvoline Premium Blue 15W-40	15W-40	CK-4	$70–$90
Chevron Delo 400 XLE 15W-40	15W-40	CK-4	$95–$110
Chevron Delo 400 XLE 10W-30 Synblend	10W-30	CK-4	$90–$110
Shell Rotella T6 5W-40 Full Synthetic	5W-40	CK-4	$120–$150

Prices are approximate market ranges and change over time — check current pricing before purchasing. All listed products carry the CK-4 rating, which is backward compatible with older diesel API categories.

Verified Engine Oil Capacities by Model

Model	Verified Capacity (with filter)
BX1880	3.8 qt
L2501	6.0–6.3 qt (varies by configuration)
L4701	8.7 qt
MX5400 / MX6000	8.9 qt

For BX2380, BX2680, BX23S, B2601, B2650, L3301, L3901, M6060, and M7060, we could not verify a capacity figure from a Kubota manual or spec sheet in this pass — check your operator’s manual rather than relying on a generic figure, since even similar-looking models can differ meaningfully. See our Kubota Engine Oil Capacity Guide for what we’ve confirmed elsewhere.

🛢️ Widely-Used Kubota-Compatible Diesel Oils — CK-4 Rated:

Shell Rotella T4 Triple Protection 15W-40 — 5-Gallon Pail

CK-4 rated, widely used in BX, B, L and M series engines

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Shell Rotella T6 5W-40 Full Synthetic — Cold Climate & Extended Drain

Best for cold-weather starts and extended drain intervals — CK-4 full synthetic

View

Valvoline Premium Blue 15W-40 — 5-Gallon Pail

Fleet-grade performance, CK-4 rated

View

Kubota Super UDT2 2.5 Gallon — HST, Wet Brakes & Hydraulics

OEM-spec fluid for HST transmission, wet brakes and hydraulic system — never substitute engine oil here

View

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⚠️ HST transmission warning: Never substitute engine oil for Super UDT2 in HST transmissions, wet clutches, or final drives. Kubota’s HST circuit requires specific friction modifiers for wet brakes and clutch operation.

API Service Categories Explained

CK-4 — Current standard for 2017+ heavy-duty diesels. Improved oxidation and shear stability. Backward compatible with CJ-4, CI-4 Plus, CI-4, and CH-4 — safe in older Kubota engines.

CJ-4 — Introduced for 2007–2016 diesels with DPFs. Still common in farm oils, compatible with older non-DPF engines.

CI-4 Plus — Earlier category for high-soot EGR diesels. Suitable for pre-2007 off-road engines. Often contains higher zinc levels beneficial for older mechanical Kubota diesels.

💡 Note: Do NOT use older API categories (CJ-4 or CI-4) in new Tier 4 engines with DPFs — higher ash and phosphorus levels can shorten DPF life. For Tier 4 tractors always use CK-4.

JASO MA/MA2 — What It Actually Means

JASO MA and MA2 are oil performance classifications, but they’re principally aimed at four-stroke motorcycle engines with wet clutches, where the same oil lubricates both the engine and the clutch. For a Kubota diesel tractor engine, the controlling specification is the viscosity grade and diesel-engine service classification stated in your operator’s manual — not a motorcycle wet-clutch certification. JASO MA/MA2 generally isn’t a required or relevant spec for Kubota tractor engine oil unless your specific model’s manual explicitly calls for it.

Synthetic vs Conventional — Which Is Right for Your Kubota?

✓ Synthetic Advantages

Better cold-weather starting — especially 5W-40 and 0W grades
Extended drain potential with oil analysis
Superior high-temperature film strength under heavy loads
Less varnish and sludge in hot-running engines

✓ Conventional Advantages

Lower upfront cost per change
Adequate for low-to-moderate hour usage
Easy availability at farm stores and auto parts chains
Best for break-in period on new or rebuilt engines

? Frequently Asked Questions

Will using aftermarket oil void my Kubota warranty?

No — US warranty law does not allow manufacturers to require their own branded oil. As long as the oil meets Kubota’s published viscosity and API specs, the warranty remains valid. The manufacturer must prove an improper fluid caused the failure before denying coverage. Keep receipts and service records as documentation.

How much does genuine Kubota engine oil cost?

A 5-gallon pail of genuine Kubota 15W-40 (part 70000-10005) runs approximately $133-154 at authorized dealers, depending on where you buy. Prices vary by dealer and change over time.

What’s the difference between Kubota Super UDT2 and engine oil?

Super UDT2 is a universal tractor transmission and hydraulic fluid for HST transmissions, final drives, wet brakes and hydraulics — not a crankcase oil. It contains friction modifiers for wet clutches that engine oil lacks. For the engine crankcase use 15W-40 or 10W-30 diesel oil per your manual. Never substitute engine oil in the HST.

Does JASO MA/MA2 matter for my Kubota?

Generally, no. JASO MA/MA2 is a motorcycle wet-clutch oil classification, not a standard requirement for diesel tractor engines. Match your oil to the viscosity and API diesel rating (CK-4 or CJ-4) in your operator’s manual instead.

How often should I change oil in my Kubota tractor?

Every 50 hours for the first change (mandatory break-in), then every 200 hours or annually for most BX, B and L series models under normal conditions. Always check your operator’s manual — intervals vary by engine. See our Kubota Oil Change Interval Guide.

Related Kubota Oil & Maintenance Guides

Kubota Engine Oil Capacity Guide →

Exact oil capacities for every BX, B, L and M series model

Kubota Oil Change Interval Guide →

Model-specific service schedules

Kubota Filter Cross-Reference Master Chart →

Verified oil, hydraulic, and HST filter numbers

Kubota Super UDT2 Cross-Reference Guide →

Real pricing and honest aftermarket compatibility

Kubota 50-Hour Service Guide →

Break-in oil change procedure

Kubota Fluid Capacity Chart →

Oil, hydraulic, coolant and transmission capacities

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