1997 Buick Regal Owner's Manual - Page 368

I Short TripKity Maintenance Schedule I 100,000 Miles (166 000 km) 0Inspect spark plug wires. An Emission Control Service. 99,000 Miles (165 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. (See footnote *.) 0Replace spark plugs. An Emission Control Service. 0Change automatic transaxle fluid and filter if the vehicle is mainly driven underone or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches90O F (32°C) or higher. - In hilly or mountainous terrain. DATE ACTUAL MILEAGE SERVICED BY: 7-26