1996 Ford Taurus Owner's Manual - Page 276

Ford Premium Cooling System Fluid is an optimized formula that will protect all metal and rubber elastomers used in Ford engines for four years or 50,000 miles (80,000 km). It is not necessary and not recommended to use supplemental coolant additives in your vehicle. These additives may harm your engine cooling system. Follow the recommended service interval for changing your engine coolant. NOTE: When you change or add engine coolant, it is important to maintain your engine coolant concentration between 40% (-11˚F [-24˚C]) and 60% (-62˚F [-52˚C]), depending on your local climate conditions. Below 40% you will lose freeze protection and above 60% your engine may overheat on a warm day. NOTE: Less than 40% of coolant concentration may cause engine corrosion and overheating. Plain water may be used in an emergency only. Replace it with the specified coolant as quickly as possible. NOTE: The use of an improper coolant may void your warranty for the engine cooling system. Use only a premium, nationally recognized brand name engine coolant. Do not use alcohol, methanol antifreeze or engine coolant mixed with alcohol or methanol antifreeze. If you do not use the proper coolant, the aluminum engine on your vehicle will corrode. 279