1996 Buick Regal Owner's Manual - Page 301

Short Trip/City Maintenance Schedule 50,000 Miles (83 000 km) Change automatic transaxle fluid and filter 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. 51,000 Miles (85 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. Ifyou do not use your vehicle under any these of conditions, the fluid and.filter do not require changing. I DATE I ACTUAL MILEAGE SERVICED B Y I DATE ACTUAL MILEAGE SERVICED B Y 7-15