1995 Buick Regal Owner's Manual - Page 293

I MaintenanceSchedule I [J Change I 100,000 Miles (166 000 km) Change automatic transaxle fluidand fi1ter if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90 O 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. If you do not use your velzicle under any of these conditions, the fluid and filter do not require clzanging. ~ 99,000 Miles (165 000 km) engine oil and filter (or every 3 months, whichever occurs first). An Emission Contm1 Service. O DATE MILEAGE ACTUAL SERVICED BY - L 7-25