1997 Cadillac Seville Owner's Manual - Page 292

The cooling s stem in your vehicle is filled with DEX-COOL engine coolant. This coolant is designed to remain in your vehicle for 5 years or 150,000miles (240 000 km), whichever occurs first, if you add only DEX-COOL" extended life coolant. The following explainsyour cooling system and how to add coolant when it is low. If you have a problem 8 NOTICE: When adding coolant, is important thatyou it (silicate-free) coolant. use only DEX-COOL@ If coolant other than DEX-COOL@' added to is the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolantwill require change sooner at 30,000 miles (50 000 km) or24 months, whichever occurs first. Damage caused the use by of coolant other than DEX-COOL@is not covered by your new vehicle warranty. with engine overheating, see"Engine Overheating" in the Index. A 50/50 mixture of water and DEX-COOL" coolant will: 0 -- Give freezing protection down to -34°F (-37°C). Give boiling protection up to 265°F (129°C). Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work as they should. 0 Use a mixture of one-half cEean wccfer (preferably distilled) and one-half DEX-COOL'" coolant which won't damage aluminum parts. If you use this mixture, you don't need to add anything else.