1998 Oldsmobile Aurora Owner's Manual - Page 339

I MaintenanceSchedule 0 Inspect spark plug wires. I I DATE 100,000 Miles (166 000 km) An Emission Control Service. Replace spark plugs. An Emission Control Service. 0 Change automatic transaxle fluidand bottom screens if the vehicle is mainly driven under one or more these conditions: of - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. I you do not use your veh.icle under any of these conditions, th.ejluid and f filter do not require changing. I ACTUAL MILEAGE I SERVICEDBY I 1 150,000 Miles (240 000 km) 17 Drain, flush andrefill cooling system (or every60 months since last service, whichever occurs first). See "Engine Coolant" in the Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling systemand pressure cap. An Emission Control Service. MILEAGE 7-13