Kubota Engine Oil Capacity: BX, B, L, M Series (2026)

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⚡ Quick Answer

Kubota engine oil capacity ranges from 1.8 quarts on BX1880 models to 12 quarts on M7-series tractors. BX series: 1.8–3.2 qts with filter. B series: 3.5–4.8 qts. L series: 4.8–7.4 qts. M series: 8.5–12 qts. Always use the “with filter” capacity for a full oil change — always fill to the FULL dipstick mark, not blind-pour the spec number. Use 15W-40 diesel oil for most climates. Oil filter HH150-32094 fits most BX models; HH150-32430 fits most B, L, and M series.

Getting the exact oil capacity wrong on a Kubota isn’t just inconvenient — it causes real damage. Overfilling a BX2380 by just half a quart (a 20% excess) foams the oil through crankshaft contact, blows seals, and causes smoke. Underfilling an L3901 by a quart leaves bearings starved during loader work. This guide gives you exact quart amounts for every BX, B, L, and M series model so you buy the right amount and fill correctly the first time.

Kubota Engine Oil Capacity by Model — Complete Reference Table

Model (Engine)	Without Filter	With Filter ✅	Oil Filter Part #	DIY Cost
BX SERIES — SUBCOMPACT
BX1880 (D902-E4)	2.0 qts	2.2 qts	HH150-32094	$25–34
BX2380 (D1105-E4)	2.4 qts	2.6 qts	HH150-32094	$25–34
BX2680 / BX23S (D1105-E4)	2.4 qts	2.6 qts	HH150-32094	$25–34
B SERIES — COMPACT
B2301 (D1703-M)	3.3 qts	3.5 qts	HH164-32430	$30–40
B2601 (D1803-CR)	4.6 qts	4.8 qts	HH164-32430	$35–50
L SERIES — UTILITY
L2501 (D1803-CR)	5.3 qts	5.7 qts	HH164-32430	$40–55
L3301 (V2403-CR)	6.1 qts	6.3 qts	HH164-32430	$47–62
L3901 (V2403-CR-TE4)	6.9 qts	7.1 qts	HH164-32430	$50–65
L4701 (V2607-CR-TE4)	7.2 qts	7.4 qts	HH164-32430	$55–70
M SERIES — UTILITY / COMMERCIAL
M5-111 (V3307-CR-TE4)	8.3 qts	8.5 qts	HH164-32430	$60–80
M6-141 (V3800-CR-TE4)	9.8 qts	10.0 qts	HH164-32430	$69–89
M7-171 (V3800-TIEF4)	11.8 qts	12.0 qts	HH164-32430	$80–100

⚠️ Always fill to the FULL dipstick mark — not to the spec number. Drain residuals, filter volume variance, and gallery oil mean the spec and actual fill often differ by 0.2–0.5 quarts. Add 90% of capacity, run 30 seconds, wait 5 minutes, then top to FULL in 0.1 qt increments.

🛢️ Recommended Oil & Filters — All Kubota Series:

Always use the “with filter” capacity as your starting point — add 90% first, idle 30 seconds, wait 5 minutes, then top to FULL dipstick mark.

Shell Rotella T4 15W-40 5 Gallon — All Kubota Models

Recommended 15W-40 diesel oil for BX, B, L and M series — CI-4/CJ-4 rated, best value for high-volume L and M series changes

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Shell Rotella T6 Full Synthetic 5W-40 — Cold Climate Alternative

CJ-4 rated — best cold start protection for BX and B series, works in all Kubota engines year-round

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Oil Filter HHK20-36990 — BX Series (BX2380, BX23S, BX2680)

OEM replacement for BX compact models — replace at every 50-hour oil change

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Oil Filter HH164-32430 OEM 2-Pack — B, L and M Series

Fits B2601, L2501, L3301, L3901, L4701, M5-111, M6-141 — stock up for multiple service intervals

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GearWrench 20pc Ratcheting Combo Wrench Set — Drain Plug & Filter

17mm for drain plug, covers every fastener on the oil change service

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Kubota Shop Manual — Exact Capacities & Torque Specs by Model

Model-specific oil capacities, drain plug torque specs and service procedures

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How to Check Kubota Engine Oil Level Correctly

💡 30% of first-time DIY services get the level wrong — usually from checking too soon after shutdown or on uneven ground. Follow these steps exactly.

Park on level ground — even a 5-degree slope skews readings by 0.5 qts on BX models
Warm the engine under light load to full operating temperature
Shut off and wait 5 minutes — checking too soon shows falsely low levels while oil drains from the top end
Pull dipstick fully, wipe clean, reinsert fully, withdraw — read between ADD and FULL marks
Ideal level: midway to FULL — never above FULL, never below ADD

✅

Correct

Between FULL and ADD, near FULL — safe for all loads and slopes

⚠️

Low

At or below ADD — top off immediately before any work

🚫

Overfilled

Above FULL — drain immediately, foams oil and blows seals

Kubota Oil Change — Step by Step

What you need:

Correct oil volume for your model (table above) • Oil filter • 17mm drain wrench • Filter wrench • 5-gallon drain pan • Funnel • Rags • Optional crush washer

Warm engine under moderate load — thin oil drains completely; cold oil leaves 0.3–0.5 qts behind
Park level, kill engine — position drain pan under plug
Remove 17mm drain plug counterclockwise — hot oil gushes fast; stand clear
Let drain 10–15 minutes fully — inspect drained oil for metal glitter (bearing wear) or milkiness (coolant contamination)
Reinstall drain plug — torque to 22–25 lb-ft with optional new crush washer
Remove oil filter counterclockwise — catches 0.3 qts; have rag ready
Pre-fill new filter halfway with fresh oil, lube gasket thinly — hand thread then 3/4-turn wrench snug only
Pour 90% of capacity through funnel (e.g., 2.3 qts for BX2380, 5.7 for L3301)
Idle 30 seconds, shut off, wait 5 minutes, dipstick check
Top in 0.1 qt increments to FULL mark — recheck after first hour of use as filter fully saturates

✓ DIY savings: BX2380 DIY $25–34 vs dealer $120–150. L3301 DIY $47–62 vs dealer $150–200. M6-141 DIY $69–89 vs dealer $200–280. Two services per year saves $170–260 per tractor.

Kubota Oil Type by Series

Series	Recommended Oil	Cold Climate Alternative	Change Interval
BX Series	15W-40 CI-4 or CJ-4 diesel	5W-40 synthetic	Every 100–200 hrs
B Series	15W-40 CI-4 or CJ-4 diesel	5W-40 synthetic	Every 100–200 hrs
L Series	15W-40 CI-4 or CJ-4 diesel	10W-30 conventional	Every 100–200 hrs
M Series	15W-40 CI-4 or CJ-4 diesel	10W-30 conventional	Every 100–200 hrs

Related Kubota Maintenance Guides

Kubota Oil Type Guide: 15W-40 vs 10W-30 →

Which viscosity for your climate and series — complete comparison

Kubota Oil Change Interval Guide →

BX every 100 hrs, B and L every 200–400 hrs — full interval schedule by series

Kubota Filter Cross-Reference Master Chart →

Save 30–60% on oil filters — OEM part numbers for every model

Kubota Fluid Capacity Chart — All Models →

Oil, hydraulic, coolant and transmission capacities for BX, B, L and M series

Kubota 50-Hour Service Guide →

Complete break-in service — the most important oil change you will ever do

Kubota Oil Pressure Problems →

Oil pressure light on — sensor location, gauge test and pump diagnosis

? Frequently Asked Questions

How much oil does a Kubota BX2380 take?

The BX2380 with D1105-E4 engine takes 2.4 qts without filter and 2.6 qts with filter. Buy one 2.5-quart jug of 15W-40 plus a small top-off bottle. Oil filter is HH150-32094. DIY cost is $25–34 versus $120–150 dealer. Always fill to the FULL dipstick mark — not blind-pour the full spec amount.

How much oil does a Kubota L3901 take?

The L3901 with V2403-CR-TE4 engine takes 6.9 qts without filter and 7.1 qts with filter. Buy two 1-gallon jugs of 15W-40. Oil filter is HH164-32430. DIY cost is $50–65 versus $150–200 dealer. Always fill to the FULL dipstick mark rather than blind-pouring the full spec amount.

What happens if I overfill Kubota engine oil?

Overfilling a BX2380 by just half a quart (20% excess) causes the crankshaft to whip the oil into foam, killing lubrication while pressure blows seals and breathers. Symptoms include smoke, oil-soaked air filter, and seal leaks. Drain to the FULL mark immediately. On L and M series the percentage is lower but the damage pattern is the same.

Should I use “with filter” or “without filter” capacity?

Always use “with filter” capacity for a full oil change — it accounts for the 0.2–0.4 qts held in the filter. “Without filter” only applies to rare top-offs where the filter is not being replaced. Skipping the filter and using the lower number leaves old contaminated oil circulating through the engine.

Can I use synthetic oil in a Kubota tractor?

Yes — synthetic 15W-40 diesel oil works in all Kubota engines and is especially beneficial in temperature extremes. Shell Rotella T6 is the most commonly recommended option. Capacity stays identical regardless of synthetic or conventional. You can switch at any time without flushing.

Why is my dipstick reading low after pouring the full spec amount?

Drain residuals in coolers and galleries, filter volume variance, and incomplete drains mean actual fill often needs 0.2–0.5 qts more than the spec. Add 90% of capacity, idle 30 seconds, wait 5 minutes, then top in 0.1 qt increments to the FULL mark. The dipstick is always the final authority — not the spec number.

📖 Need the full engine service manual? Download the Kubota D722/D902 Series Diesel Engine Full Service Manual PDF — covers Z482, Z602, D622, D722, D782, D902 engines. Instant download.

🛢️ Save 40–50% on Kubota engine oil? See our complete Kubota Engine Oil Cross-Reference Guide — Rotella, Mobil and Valvoline equivalents for 15W-40, 10W-30 and 5W-40. All CK-4 rated, warranty safe.

🚜 Own a Kubota L2501? See our complete Kubota L2501 Problems Guide — 7 most common issues, OEM part numbers, fluid specs and dealer vs DIY cost estimates.

🌬️ Need a Kubota air filter cross reference? See our complete Kubota Air Filter Cross-Reference Chart — Donaldson, WIX, FRAM, Baldwin and NAPA equivalents for BX, L and M series. Save 40–65% vs OEM.

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