Coolant Selection and Performance

COOLANT SELECTION
The use of aluminum engine components require special corrosion protection. Mopar Antifreeze/Coolant Three Year Formula (green in color) is recommended for optimum engine cooling and corrosion protection when mixed to a freeze point of -37°C (-35°F) to -59°C (-50°F).

CAUTION: Do not use well water, or suspect water supply in cooling system. A 50/50 ethylene glycol and distilled water mix is recommended.

COOLANT PERFORMANCE
Coolant performance is measurable. For heat transfer, one pound of pure water absorbs 1 btu for each degree of temperature rise. This formula is altered when necessary additives to control boiling, freezing, and corrosion are added as follows:
^ Pure Water (1 btu) boils at 100°C (212°F) and freezes at 0°C (32°F).
^ 100 percent ethylene glycol (0.7 btu) can cause an engine to run hot, cause detonation, and will freeze at-22°C (-8°F).
^ 50 percent ethylene glycol and 50 percent distilled water (0.82 btu) is the recommended combination that provides a freeze point of -37°C (-35°F). The radiator, water pump, engine water jacket, radiator pressure cap, thermostat, temperature gauge, coolant sensor and heater are all designed for a 50/50 mixture of ethylene glycol/distilled water.

NOTE: Some geographical locations may require a 56 percent ethylene glycol and 44 percent water mixture. This will provide a freeze point of -46°C (-50°F).