1995 Buick Century Owner's Manual - Page 291

I Maintenance Schedule I1 50,000 Miles (83 000 km) 0Change automatic transaxle fluid filter and if the vehicle ismainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90 F (32°C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. O - Uses such as found intaxi, police or delivery service. If you do not use your vehicle under any o f these conditions, the fluid and filter do not require changing. DATE ACTUAL MILEAGE + SERVICED BY: 7-31