Kubota Coolant Type: What the Manuals Say

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Quick Answer

Kubota’s manuals say to use an ethylene glycol (EG) long-life coolant, mixed 50/50 with clean soft water, changed every 2,000 hours or 2 years, and never mixed with a different manufacturer’s coolant or a different type of antifreeze. Kubota describes its own coolant as phosphate-based with no silicate, borate or nitrite. The genuine part numbers are 70040-0L014 (concentrate) and 77700-06325 (50/50 premix). No aftermarket coolant has a Kubota approval, and we found nothing that defines a separate “SLLC” grade.

Orange product names are Amazon affiliate links (we may earn a commission at no cost to you). Genuine Kubota coolant is sold through Kubota dealers. We could not find a qualifying listing on Amazon.

What Kubota Publishes About Its Coolant

Item	What Kubota says	Source
Base	Ethylene glycol (EG) type	L2501 operator’s manual, printed p. 100
Inhibitors	“Premium Ethylene Glycol-based phosphate coolant” with no silicate, borate or nitrite	Kubota technical sheet (hosted by Coleman Equipment)
Mix	50/50 with clean soft water	L2501 manual p. 100; BX manual p. 91
Color	Concentrate “yellowish green”; premix listed as green	Kubota SDS; Messick’s listing
Change interval	Every 2,000 hours or 2 years, whichever comes first	L2501 p. 100; BX p. 91; L4701 p. 120
Mixing brands	“Never add any long-life coolant of different manufacturer”	L2501 manual p. 100
Mixing types	“Do not mix different types of antifreeze”	L2501 manual p. 100

The exact inhibitor list is not published, so we cannot tell you which additives are in it, only the ones Kubota says it leaves out.

LLC vs SLLC: What We Found

What the Manuals Actually Say

Kubota’s manuals use the phrase “long-life coolant,” often shortened to LLC. We did not find “SLLC” defined in the Kubota manuals, safety data sheet or technical sheet we checked. If a coolant label says SLLC and claims it suits Kubota, treat that as the seller’s claim and confirm with your Kubota dealer before using it.

Genuine Kubota Coolant

Part number	Product	Price (Messick’s, Oct 20, 2026)
70040-0L014	Extended Life Antifreeze / Coolant, 100% concentrate, 1 gallon	$21.51
77700-06325	1 gallon 50/50 premix Extended Life Antifreeze / Coolant (green)	$17.08

Concentrate makes about two gallons of finished coolant and the premix makes one. See our coolant cross-reference guide for part numbers, capacities and the published chemistry of other brands.

How Other Coolants Compare on Paper

Coolant	Type (maker’s words)	Phosphate	Silicate	Nitrite	Kubota approval
Genuine Kubota	Ethylene-glycol phosphate coolant	Yes	None	None	Genuine
Zerex Asian Vehicle Blue	HOAT	Yes	None	None	Not found
Zerex G-05	Ethylene-glycol HOAT	Phosphate-free	Low-silicate	Contains nitrites	Not found
Peak Global Lifetime	Organic acid technology	Not found	None	None	Not found

This table uses what each maker publishes, and “Not found” means we could not find the value. A similar chemistry type is not a Kubota approval, and Kubota says not to mix brands or types.

Zerex G-05 Is Not a Match

Valvoline describes Zerex G-05 as phosphate-free, low-silicate and containing nitrites. Kubota’s coolant is phosphate-containing with no silicate or nitrite. If G-05 has been in your tractor, drain and flush the system fully and refill with one coolant.

Mix Ratio and Water

Ratio: Kubota’s manual says to use a 50/50 mix. We did not verify freeze points or other ratios, so we do not list any.
Water: the manual says “clean soft water.” Distilled water is a common choice for mixing concentrate.
Premix: 77700-06325 is already 50/50. Pour it as is, and do not add water.

For mixing math, see the coolant mix ratios guide and the mix calculator.

If You Do Not Know What Is in Your Tractor

Color alone does not identify a coolant, so do not guess from it.
Kubota says never to mix types or manufacturers. Topping up with something unknown goes against that.
The safe course is to drain and flush the system as your manual describes, then refill with a single coolant. Our coolant flush guide covers the steps.

Where to Buy

If You Choose an Aftermarket Coolant

Not a Kubota approval. Flush fully first, and do not mix it with Kubota coolant.

Zerex Asian Vehicle Blue
HOAT with the same published chemistry type as Kubota’s. Check the listing for size and dilution.

Check Price on Amazon

Zerex Asian Vehicle Blue (50/50 premix)
Ready to use.

Check Price on Amazon

Distilled or soft water
For mixing concentrate 50/50.

Check Price on Amazon

Genuine Kubota coolant (70040-0L014 and 77700-06325) is sold through Kubota dealers. Order by part number.

What We Could Not Verify

A definition of “SLLC” from Kubota, and any Kubota approval for a coolant sold as SLLC.
The exact inhibitor list for Kubota coolant, and whether the premix matches the concentrate.
The antifreeze page in the M6060/M7060 manual, and the service interval for the M5-111 and BX23S.
Any Kubota approval for Zerex, Prestone or Peak coolants, and the phosphate, silicate and nitrite content of Prestone products.
Freeze-point figures for ratios other than 50/50.

How We Verified This Page

Kubota part numbers and prices come from Messick’s (checked Oct 20, 2026). Chemistry comes from Kubota’s SDS and a Kubota technical sheet hosted by Coleman Equipment, and the other coolants from Valvoline and Peak pages. Mix, interval and mixing rules come from Kubota-authored operator’s manuals hosted by third parties (ManualsLib and Scribd), with printed pages where verified. Confirm with your Kubota dealer before you change coolants.

❓Frequently Asked Questions

QWhat type of coolant does a Kubota tractor use?

Kubota’s manual says to use an ethylene glycol (EG) long-life coolant mixed 50/50 with clean soft water. Kubota describes its own coolant as phosphate-based with no silicate, borate or nitrite.

QWhat is the difference between LLC and SLLC coolant?

Kubota’s manuals say “long-life coolant.” We did not find SLLC defined in any Kubota document we checked, so we cannot explain a difference. Ask your Kubota dealer if a label claims it.

QCan I use universal or all-makes coolant in a Kubota?

Kubota says never to add a long-life coolant from a different manufacturer and never to mix types. We found no Kubota approval for any universal coolant.

QWhat color is Kubota coolant?

Kubota’s SDS describes the concentrate as “yellowish green,” and the premix is listed as green. Go by the product label, not the color.

QWhat is the Kubota coolant part number?

70040-0L014 is the 1-gallon 100% concentrate and 77700-06325 is the 1-gallon 50/50 premix. Messick’s listed them at $21.51 and $17.08 on Oct 20, 2026.

QHow often should I change Kubota coolant?

Kubota’s BX, L2501 and L4701 manuals say every 2,000 hours or 2 years, whichever comes first. Check your own manual for your model.

Related Guides

Coolant Cross-Reference Guide →

Part numbers, capacities, chemistry

Coolant Flush Guide →

Drain and flush before a change

Coolant Mix Ratios Guide →

Mixing and water

Tractor Overheating Guide →

Radiator, coolant and thermostat checks

Fluid Capacity Chart →