1997 Buick Century Owner's Manual - Page 349

I Short TripKity Maintenance S c h e d T l 66,000 Miles (110 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 69,000 Miles (115 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 1 ACTUAL MILEAGE SERVICED BY: DATE I I ACTUAL MILEAGE SERVICED BY: I I 7-19