1993 Oldsmobile 88 Owner's Manual - Page 239

Service & Appearance Care I INFORMATION CENTER Adding Coolant To Check Coolant: When your engine is cold, the coolant mTLL level should be between the COLD mark and FULL HOT. When your engine is warm, the level should be up to FULL HOT, or a little higher. If you have the Electronic Clusteror LSS Cluster and your coolant level is low, the information center display will show: COOLANT LEVEL LOW To Add Coolant: If you need more mix coolant, add the proper at the coolant recovery tank. VAU I I W I W Turning the radiator pressure cap when the engine and radiator are hot can allow steam and scalding liquidsto blow out and burn you badly. With the coolant recovery tank, you will almost never have to add coolant at the radiator. Never turn the radiator pressurecap-even a little-when the engine and radiator are hot.