1996 Oldsmobile Aurora Owner's Manual - Page 267

NOTICE: 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 mix will. Your vehicle's coolant warning mix. system is set for the proper coolant With plain water or the wrong your engine could mix, get too hotbut you wouldn't get the overheat warning. Your engine could catch fire you or and others could be burned. a 50/50 mix of clean Use water and DEX-COOL (orange-colored, silicate-free) antifreeze. TM If you us& improper coolant an mix, your engine could overheat and badly damaged. The be repair cost wouldn't be covered your by warranty. Too much water in the mix can freeze and crack the engine, radiator, heater core and other parts. If you have to add coolant more than four times a year, have your retailercheck your cooling system. I NOTICE: If you use the proper coolant, you don't have to add extra inhibitors or additives which claim to improve the system. These can harmful. be