1998 Oldsmobile 88 Owner's Manual - Page 309

I ShortTrip/CityMaintenanceSchedule I 100,000 Miles (166 000 km) (Continued) 0 Change automatic transaxle fluid and if the vehicle is mainly driven filter under one or more of these conditions: - In heavy city traffic wherethe outside temperature regularly reaches90°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. v y o u do not use your vehicle under any these conditions, the of fluid and filter do not require changing. 150,000 Miles (240 000 km) 0 Drain, flush and refill cooling system (or every months since last service, 60 DATE whichever occurs first).See "Engine Coolant" in the Index what to use. for Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test cooling system and pressure cap. An Emission Control Service. 7-20