1995 Buick Century Owner's Manual - Page 297

Maintenance Schedule I1 100,000 Miles (166 000 km) 0Replace spark plugs (2.2L Code 4 engine only). An Emission Control Service. 0Change automatic transaxle fluid and filter if the vehicle is mainly driven under or one more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90 O F ( 3 2 ° C ) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. I f you do not use your vehicle under any o f these conditions, the fluid and filter donot require changing. DATE ACTUAL MILEAGE SERVICED BY: 7-37