1997 Pontiac Sunfire Owner's Manual - Page 268

How to Check You do not need to check the fluid level unless you suspect a clutch problem. To check the fluid level, take the cap off. If the fluid reaches the step inside the reservoir, the fluid level is correct. Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work as they should. I Engine Coolant The cooling system in your vehicle is filled with DEX-COOL@engine coolant. This coolant is designed toremain in your vehicle for 5 years or 150,000 miles (240 000 km), whichever occurs first, if you add only REX-CQOL@extended life coolant. The following explains your cooling system and how to add coolant when is low. If you have a problem with it engine overheating, see "Engine Overheating" in the Index. NOTICE: When adding coolant, it important that you is use onlyDEX-COOL@(silicate-free)coolant. If coolant other thanDEX-COOL@isadded to 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) or 24 months, whichever occurs first. -- A 50/50 mixture of water andDEX-COOL' coolant will: Give freezing protection down to -34°F (-37°C). Give boiling protectionup to 265OF ( 129O C . ) 6-24