From the service manual:
The use of aluminum cylinder blocks, cylinder heads, and water pumps requires special corrosion
protection. Mopar Antifreeze/Coolant, 5 Year/100,000 Mile Formula (MS-9769), or the equivalent
ethylene glycol base coolant with hybrid organic corrosion inhibitors (called HOAT, for Hybrid Organic
Additive Technology) is recommended. This coolant offers the best engine cooling without corrosion when
mixed with 50% Ethylene Glycol and 50% distilled water to obtain a freeze point of -37°C (-35°F). If it
loses color or becomes contaminated, drain, flush, and replace with fresh properly mixed coolant solution.
The green coolant MUST NOT BE MIXED with the orange or magenta coolants. When replacing coolant
the complete system flush must be performed before using the replacement coolant.
Zerex G-05will do it (approved by Chrysler). Also Prestone DEX-COOL.
