1993 Buick Century Owner's Manual - Page 241

Engine Coolant I The following explains your cooling system and how to CAUTION: add coolant when it low. If you have a problem with is engine overheating, see "Engine Overheating" in the Index. Adding only plain water to your coollng system can be dangerous. Plain water, or some other The proper coolant for your Buick will: liquid like alcohol, canboil before the proper coolant mix will. Mur vehicle's coolant Give freezing protection down to -34°F (-37°C). warning systemI set for the proper coolant s Give boiling protection up to 262"(128"C). F mix. With plain water or the wrong mlx,your engine could get too hot but you wouldn't get Protect against rust and corrosion. the overheat warning. b u r engine could catch Help keep the proper engine temperature. fire and you or others'could be burned. Use a Let the warning lights work they should. as 50/50 m x of clean water and a proper P antifreeze. What to Use: Use a mixture one-half clean water of (preferably distilled) and one-half antifreeze that meets "GM Specification 1825-Mi' which won't damage aluminum parts. You can also use recycled coolant a conforming to GM Specification 1825-M with a complete coolant flushand refill. Use GM Engine Coolant Supplement (sealer) with any complete coolant change. If you use these, you don't need to add anything else. : warranty. Too much and crack t other parts A I l 239