1998 Chevrolet Lumina Owner's Manual - Page 262

NOTICE: I you usean improper coolant mixture, your f engme could overheat and be badly damaged. The repair cost wouldn't be covered by your warranty. Too much water in the mixture can freeze and crack the engine, radiator, core heater and other parts. If you have to add coolant more than times a year, four have your dealer check your cooling system. Checking Coolant NOTICE: I you use the f proper coolant,you don't have to add extra inhibitors or additiveswhichclaimto improve the system. These can be harmful. When your engine is cold, the coolant level should be at theCOLD mark ora little higher. When your engine is warm, thelevelshouldbe up to the HOT mark or a little higher. 6-24 I