The 2018 Jeep Grand Cherokee typically uses Mopar Antifreeze/Coolant Type 2 HOAT, usually sold as a premixed 50/50 solution. This is the standard specification recommended by FCA/Jeep for most late-model vehicles in this lineup.
In practice, that means checking your owner’s manual or the sticker on the coolant reservoir to confirm the exact specification for your engine variant. Use only a HOAT-type coolant that explicitly meets the Type 2 specification used by Chrysler/Jeep, and avoid mixing incompatible coolant chemistries, which can lead to corrosion or cooling-system damage. If you’re unsure, consult a Jeep dealer or a qualified mechanic before purchasing or topping off coolant.
Recommended coolant type
Below are the coolant options commonly recognized for the 2018 Grand Cherokee, with a focus on the official Mopar product and compatibility guidelines.
- Mopar Antifreeze/Coolant Type 2 HOAT (50/50 premixed)
- Any HOAT coolant that explicitly lists compatibility with FCA/Chrysler Type 2 specification on the label
In short, use Mopar Type 2 HOAT or a HOAT coolant clearly labeled as Type 2 compatible with Chrysler/Jeep vehicles, and avoid mixing with non-HOAT or non-Type-2 formulas.
How to check and replace coolant
If you’re planning to check levels or perform a replacement, follow these steps to ensure you’re using the correct product and procedure.
- Ensure the engine is cool before opening the radiator cap or reservoir to avoid scalding.
- Locate the coolant reservoir and check the level against the markings on the side of the tank; top off if needed with the same Type 2 HOAT coolant.
- For a full drain and fill, flush the cooling system as recommended by the manual, then refill with a 50/50 mix of HOAT Type 2 coolant and distilled water.
- Dispose of old coolant properly and never pour it down drains or onto the ground; use a recycling center or automotive shop that accepts used coolant.
When in doubt, have a professional perform a complete coolant flush and refill to ensure compatibility with your vehicle’s cooling system and aluminum components.
Why using the correct coolant matters
The right coolant protects the engine from overheating, prevents corrosion, and maintains the cooling system’s integrity—especially in aluminum components commonly found in modern engines. Using the wrong type can lead to reduced heat transfer, leaks, or costly damage. Always follow the official Type 2 HOAT specification for the 2018 Grand Cherokee and avoid mixing with incompatible coolants.
Summary
The 2018 Jeep Grand Cherokee is designed to use Mopar Antifreeze/Coolant Type 2 HOAT, typically available as a premixed 50/50 solution. Verify the exact spec in your owner’s manual or on the reservoir label, and choose a HOAT Type 2 coolant accordingly. For best results, use Mopar Type 2 HOAT or a clearly labeled Type 2-compatible HOAT coolant, and have a professional handle major coolant work to protect the cooling system’s longevity.