NOTE: Propylene glycol and ethylene glycol antifreeze are not compatible and must not be mixed together. Refer to the label on antifreeze/ coolant container if necessary.
Mitsubishi recommends the use of a quality ethylene glycol coolant containing corrosion inhibitors, and approved for use with all the metals in the engine, including aluminum. Mitsubishi recommends against the use of additional cooling system additives as they may be incompatible with the coolant itself.