1997 Oldsmobile Cutlass Supreme Owner's Manual - Page 309

I ShortTripKityMaintenanceSchedule - In hilly or mountainous terrain, I 150,000 Miles (240 000 km) Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). See "Engine Coolant'' inthe Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test cooling system and pressure cap. An Emission Control Service. 100,000 Miles (166 000 km) (Continued) - When doing frequent trailer towing. - Uses such as foundin taxi, police or delivery service. If you do not use your vehicle under any of these conditions, the fZuid and filter donot require changing. I DATE I ACTUAL MILEAGE ISERVICED BY: I DATE ACTUAL MILEAGE SERVICED BY: 7-26