ACDelco 10-5027 Dex-Cool 50/50 Pre-Mix Engine Coolant/Antifreeze - 1 gal Specially formulated for long service intervals, the coolant can last up to 5 years or 150,000 miles. (Maintenance needs vary with different uses and driving conditions. See your Owner's Manual for more information) Provides effective long-term anti-corrosion support by protecting brass, cast iron, steel, solder, and copper components. Also provides superior high-temperature protection for aluminum components. Non-silicate formula retains excellent heat transfer characteristics for improved water pump life Long shelf life: storage-stable for 8 years The backwards compatible formula can be used with conventional cooling systems and may also be used for service of all 1994-95 GM vehicles EXCEPT 1994 Cavaliers/Sunfires with 4-cylinder engines. Must be replaced every 2 years/30,000 miles whenever used in a vehicle not originally designed to use Dex-Cool