1996 Buick LeSabre Owner's Manual - Page 249

'NOTICE: If you use an improper coolant mix, your engine could overheat and be badly damaged. The repair cost wouldn't be covered by your 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 dealer checkyour cooling system. Checking Coolant I NOTICE: r If you use the proper coolant, you don't haveto add extra inhibitors or additives which claimto improve the system. These can be harmful. When your engine is cold, the coolant level should be at FULL COLD or a little higher. When your engine is wan-& the levelshould be up to FULL HOT ora little higher. 6-21