1996 Buick Riviera Owner's Manual - Page 314

I Short Trip/City Maintenance Schedule I 51,000 Miles (85 000 km) Change engine oil and filter (or every 3 months, whichever occurs first). An Emission ControlService. 50,000 Miles (83 000 km) 0Change automatic transaxle fluid filter and or if the vehicle is mainly driven under one more of these c-onditions: - In heavy city traffic where :the -outside temperature regularly reaches '-F 90 (32"C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or, delivery service. Ifyou do not use your vehicle under anyof these conditions,thefluid andfilter do not require changing. ACTUAL MILEAGE 7 SERVICED B Y DATE ACTUAL MILEAGE SERVICED BY: