Kubota Coolant Cross-Reference Guide (2026)

Thank you for reading this post, don't forget to subscribe!

⚡ Quick Answer

Kubota requires a phosphate-based, silicate-free, nitrite-free ethylene glycol coolant — matching Kubota Super Coolant part numbers L1914-55004 (compact models) and L1924-55004 (utility models). Confirmed aftermarket equivalents: Zerex G-05, Prestone Asian Vehicle, Peak Asian Green — all HOAT Asian formula, all silicate-free. Never use Dex-Cool or OAT orange coolant — incompatible chemistry causes gel deposits and corrosion. Mix 50/50 with distilled water only — never tap water. OEM runs $45–65/gal vs $15–22 aftermarket — save 30–50% per change.

💡 What Color is Kubota Coolant?

Genuine Kubota Super Coolant is blue-green in color. Approved aftermarket alternatives like Zerex G-05 and Prestone Asian Vehicle are also blue-green. If your coolant is bright green — that’s traditional IAT coolant which is NOT compatible. Orange or red is Dex-Cool/OAT — also incompatible. When in doubt drain and refill with the correct HOAT Asian formula rather than topping off with an unknown coolant type.

Coolant Chemistry Types — What Works in Kubota

Type	Additives	Kubota Compatible?	Common Brands
P-HOAT (Asian)	Phosphate hybrid organic acid	✅ YES — recommended	Kubota Super Coolant, Zerex G-05, Prestone Asian, Peak Asian
HOAT	Hybrid organic acids	⚠️ Some formulas only	Zerex G-05, Peak Global Lifetime
IAT (Traditional green)	Silicates, phosphates	❌ Only if silicate-free	Peak, Prestone (green) — NOT the Asian formula
OAT (Dex-Cool)	Organic acids only	❌ NEVER — causes gel deposits	Dex-Cool, Havoline OAT, any orange coolant

Color does not confirm compatibility — always check the label for “silicate-free,” “nitrite-free,” and “Asian vehicle formula.”

BX Series Coolant Cross-Reference

Model	Capacity	OEM Part #	Zerex	Prestone	Peak
BX1880	4.8 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
BX2380	5.3 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
BX2680	5.3 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
BX23S	5.3 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian

B Series Coolant Cross-Reference

Model	Capacity	OEM Part #	Zerex	Prestone	Peak
B2301	6.9 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
B2601	7.4 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
B2650	7.4 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
B3350	8.5 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian

L Series Coolant Cross-Reference

Model	Capacity	OEM Part #	Zerex	Prestone	Peak
L2501	7.9 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
L3301	8.5 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
L3901	9.2 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian
L4701	10.1 qts	L1914-55004	Zerex G-05	Prestone Asian	Peak Asian

M Series Coolant Cross-Reference

Model	Capacity	OEM Part #	Zerex	Prestone	Peak
M5-111	~12.7 qts	L1924-55004	Zerex G-05	Prestone Asian	Peak Asian
M6-141	~14.2 qts	L1924-55004	Zerex G-05	Prestone Asian	Peak Asian
M7060	12.8 qts	L1924-55004	Zerex G-05	Prestone Asian	Peak Asian

Always verify capacity against your operator’s manual — cab configurations add heater circuit volume. See our Kubota Fluid Capacity Chart for exact model-specific volumes.

🛢️ Approved Kubota Coolant Equivalents — All Series:

All three match Kubota Super Coolant SLLC specs — phosphate HOAT, silicate-free, nitrite-free. OEM runs $45–65/gal vs $15–22 aftermarket — same protection, 30–50% savings.

Zerex G-05 Antifreeze/Coolant — Phosphate HOAT, No Silicate

Most widely used OEM-equivalent — confirmed compatible with all BX, B, L and M series (~$18/gal)

View

Prestone Asian Vehicle Antifreeze 50/50 Premix — Ready to Use

No mixing required — pour directly into system. Phosphate HOAT, silicate-free, fits all Kubota series (~$20/gal)

View

Peak Asian Premix Antifreeze — Budget-Friendly OEM-Spec Option

Same Asian HOAT formula as Zerex G-05 — confirmed compatible, competitive pricing

View

Refractometer — Verify Coolant Mix Ratio & Freeze Protection

Test for 32–36% glycol after any coolant change — essential for accurate freeze point verification (~$25)

View

As an Amazon Associate, TractorPartsCentral earns from qualifying purchases.

OEM vs Aftermarket — Cost Comparison

Coolant	Price/Gallon	BX Change Cost (~5 qts)	L Series Cost (~9 qts)	Savings vs OEM
Kubota Super Coolant OEM	$45–65	$28–41	$50–74	—
Zerex G-05	~$18	~$11	~$20	$17–30 per change
Prestone Asian 50/50	~$20	~$13	~$23	$15–28 per change
Peak Asian Premix	~$18	~$11	~$20	$17–30 per change

Kubota coolant service comes down to one rule — use a phosphate-based, silicate-free, nitrite-free Asian HOAT formula and change every 2 years or 2,000 hours. Zerex G-05, Prestone Asian Vehicle, and Peak Asian Green all meet the spec at 30–50% less than OEM. Always mix 50/50 with distilled water and verify with a refractometer after every change. For complete coolant specs and capacities see our Kubota Coolant Type Guide. For more DIY guides visit TractorPartsCentral.com.

? Frequently Asked Questions

What coolant is compatible with Kubota tractors?

Kubota requires a phosphate-based, silicate-free, nitrite-free ethylene glycol coolant matching the chemistry of Kubota Super Coolant. Confirmed compatible aftermarket alternatives are Zerex G-05, Prestone Asian Vehicle, and Peak Asian Green — all HOAT Asian formula. Never use Dex-Cool or other OAT orange coolants — incompatible chemistry causes gel deposits and corrosion in Kubota aluminum engines.

What color is Kubota antifreeze?

Genuine Kubota Super Coolant is blue-green in color. Approved aftermarket equivalents like Zerex G-05 and Prestone Asian Vehicle are also blue-green. Bright green coolant is traditional IAT formula — not compatible. Orange or red coolant is Dex-Cool/OAT — never use in Kubota. When in doubt about what’s in your system, do a full drain and refill rather than topping off with an unknown type.

Can I use Prestone or Zerex in my Kubota?

Yes — Prestone Asian Vehicle and Zerex G-05 both match Kubota Super Coolant SLLC specs exactly. Both are phosphate HOAT formula with no silicates or nitrites. Always verify the label says “Asian Vehicle” or “HOAT Asian” and confirms silicate-free. Standard Prestone green is NOT compatible — it contains silicates. Mix concentrate 50/50 with distilled water or use the premix version ready to pour.

What happens if I use the wrong coolant in Kubota?

Using Dex-Cool OAT or high-silicate formulas can cause gel-like sludge that clogs radiators and heater cores, cutting heat transfer and causing overheating. High-silicate coolants shed abrasive particles that wear water pump seals and erode thermostat housings. If wrong coolant was used, drain completely, flush multiple times with distilled water, and refill with the correct phosphate HOAT formula.

How often should I change Kubota tractor coolant?

Every 2 years or 2,000 hours whichever comes first for long-life ethylene glycol coolants. Test annually with a refractometer — if freeze protection drops below -34°F or pH drops below 7.5, change it early. Heavily worked L and M series tractors benefit from the shorter end of that window. Light-duty BX tractors may comfortably run 3–5 years between changes with annual testing.

What is the Kubota antifreeze equivalent at AutoZone or NAPA?

Zerex G-05 is the most widely available OEM-equivalent at AutoZone, NAPA, and O’Reilly. Prestone Asian Vehicle and Peak Asian Green are also stocked at most auto parts stores. All three match Kubota Super Coolant specs — look for “Asian Vehicle” or “HOAT” on the label and confirm silicate-free. Avoid anything labeled “universal” or “all makes all models” as these often contain silicates incompatible with Kubota engines.

Related Kubota Cooling System Guides

Kubota Coolant Type Guide →

LLC vs SLLC explained, mix ratios and full capacity chart

Kubota Tractor Overheating Guide →

7 causes ranked by likelihood — radiator, coolant and thermostat diagnosis

Kubota Fluid Capacity Chart →

Exact coolant, oil and hydraulic capacities for all models

Kubota Thermostat Guide →

Stuck open or closed — 15-minute diagnosis and replacement

Kubota Antifreeze Cross-Reference Guide →

Detailed antifreeze cross-reference with brand comparison

Free Kubota Parts Diagrams & Manuals →

Cooling system diagrams and parts lookup for BX, B and L series

This article contains affiliate links. TractorPartsCentral.com is a participant in the Amazon Services LLC Associates Program. When you purchase through our links, we may earn a small commission at no additional cost to you.