What Type of Antifreeze & Coolant for Mitsubishi Colt. How cararac›Coolant›MitsubishiRecommended antifreeze for radiators of Mitsubishi Colt. Find out how much coolant does your car need. Car A Rac presents recommended by manufacturers types for all popular vehicles. How to Add Coolant: Mitsubishi Colt (1995-2003) - 2003 Adding engine coolant (also known as antifreeze) to your 2003 Mitsubishi Colt is pretty easy. Engine coolant circulates through your engine to keep it cool in the summer but won't freeze in the winter. Make sure to check your engine when it is cold for an accurate reading.