1996 Pontiac Sunfire Owner's Manual - Page 207
1996 Pontiac Sunfire Manual
Page 207 highlights
A CAUTION: Adding only plain water to your cooling system can be dangerous. Plain water, or some other liquid like alcohol, can boil before the proper coolant mixwill. Your vehicle's coolant warning system is set for the proper coolant mix. With plain water or the wrongmix, your engine could get too hot but you wouldn't get the overheat and warning. Your engine could catch fire you or others could be burned. a 50/50 mix of clean Use water and DEX-COOL antifreeze. TM t NOTICE: In cold weather, watercan freeze and crack the engine, radiator, heater core and other parts.So use the recommended coolant. A CAUTION: You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Don't spill coolanton a hot engine. 5-18