What coolant does the Jeep Gladiator use?

The Jeep Gladiator uses a premixed HOAT coolant that meets Chrysler’s MS-9769 specification, typically supplied by Mopar as Mopar Antifreeze/Coolant 50/50 HOAT.

In practice, Gladiator models with the 3.6-liter Pentastar V6 or the 3.0-liter EcoDiesel rely on a long‑life ethylene glycol coolant formulated as HOAT (Hybrid Organic Acid Technology). To maintain proper cooling performance and protect the system from corrosion, use Mopar’s official 50/50 premixed coolant or any third‑party coolant that explicitly states compatibility with Chrysler MS-9769 HOAT. Do not mix different coolant chemistries or use formulas not designed for this specification.

Coolant type and specifications

The Gladiator’s cooling system is designed around HOAT coolant. The recommended practice is to use a premixed 50/50 solution based on ethylene glycol, and to choose coolant that meets Chrysler MS-9769 HOAT specification. Mopar's Antifreeze/Coolant 50/50 HOAT is the simplest option, but any third-party product that clearly states MS-9769 HOAT compatibility is acceptable.

What to avoid: avoid non-HOAT, OAT-only (orange Dex-Cool-style) formulations unless the label states compatibility with the MS-9769 standard. Mixing different coolant types can cause engine cooling failures or deposits.

Options that are acceptable include:



• Mopar Antifreeze/Coolant 50/50 HOAT (premixed), designed for Chrysler/Jeep engines and meeting MS-9769.


• Any third‑party coolant that explicitly meets Chrysler MS-9769 HOAT specification and is premixed in a 50/50 ratio.

Choosing the right coolant and following the correct mix ratio helps ensure long-term cooling system performance and protects against corrosion and freezing in diverse climates.

Maintenance and replacement guidelines

Regular monitoring of the Gladiator’s cooling system is essential. The steps below outline best-practice maintenance, though you should always follow the vehicle’s official maintenance schedule and consult a qualified technician for any service beyond basic checks.

1. Check the coolant level when the engine is cold. Look at the expansion reservoir’s MIN and MAX marks and add coolant if needed, using the correct 50/50 premixed HOAT coolant.


2. Inspect the coolant’s condition and color. If you notice contamination, sediment, or an unusual odor, have the system inspected.


3. Never open a hot cooling system. If topping up, do so with the same specification of coolant to avoid chemical reactions or gel formation.


4. For a full drain and fill, this is best performed by a professional technician who can properly purge air and check for leaks or damaged hoses.


5. Keep documentation of coolant type and replacement dates for warranty and maintenance records.

Proper coolant maintenance helps ensure reliable engine cooling, protects against corrosion, and supports optimal performance across the Gladiator’s range of engines and driving conditions.

Summary

The Jeep Gladiator uses a HOAT-based coolant, typically Mopar Antifreeze/Coolant 50/50, or any third-party coolant that explicitly meets Chrysler MS-9769 HOAT standards, in a premixed 50/50 formulation. Always follow the owner’s manual and use the proper product to ensure the cooling system remains protected and effective across climates and driving demands.

Do jeeps need special coolant?

Every vehicle manufacturer, including Jeep has developed its own coolant or requires a specific coolant that is unique to individual years and models.

Can I use universal coolant in my Jeep?

Best to use what is recommended for your car. Some may not mix properly and cause clumping. Universal isn't. Use vehicle specific coolant.

What kind of coolant goes in a Jeep Gladiator?

ZEREX – G-05 Formula 50/50 Pre-Mixed RTU Antifreeze / Coolant, 1 Gallon (Part No. ZXG05RU1)

What color is Jeep coolant supposed to be?

What Kind of Antifreeze Do I Need?