1996 Buick Regal Owner's Manual - Page 315

I LongTrip/Hig'-wayMaintenanceSchedule I 4 Miles (15 000 km) 12 months, whichever occurs first). An Emission Control Service. 50,000 Miles (83 000 km) 0Change automatic transaxle fluid filter and 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 O C) or higher. - In hilly or mountainous rerram. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. l f y o u do not use pour vehicle mder any of these conditions, thefluid and.filter do not require changing. 0Change engineoil and filter (or every 0Lubricate steering ball joints (or every 6 months, whichever occursfirst). I DATE I I ACTUAL MILEAGE 1 SERVICED B Y 7-29