1993 Oldsmobile Achieva Owner's Manual - Page 234

Service & Appearance Care Engine Coolant What to Use: The following explains your cooling system and how to addcoolant when it Use a mixture of one-half clean water is low. If you have a problem with (preferably distilled) and one-half engine overheating, see the Index under antifreeze that meets "GM Specification Engine Overheating. 1825M," which won't damage aluminum engine parts. You can also usea recycled The proper coolant for your Oldsmobile coolant conforming toGM Specification will : 1825M with a complete coolant flush Give fieezing protection down to and refdl. Use GM Engine Coolant -34"F (-37"C). Supplement (sealer) withany complete Give boiling protection up to 262°F coolant change. If you use these, you (128" C) , don't need to add anything else. Protect against rust andcorrosion. Help keep the proper engine temperature. Let the warning lights work as they should. idding only plain water to I J your cooling system can dangerous. Plain water, or some other liquid like alcohol, can boll before the proper coolant mix will. Your vehicle's coolant warning system is set for the proper coolant mix. With plain water or the wrong mix, your engine could get too hot but you wouldn't getthe overheat warning. Your engine could catch fire and you or others could be burned. Use a 50/50 m e of clean water anda proper antifreeze. I I 232