1997 Buick Century Owner's Manual - Page 344

I Short TripKity Maintenance Schedule I 45,000 Miles (75 000 km) 0Change engine oil and filter (or e:veqJ 3 months, whichever occurs first). An Emission Control Service. 42,000 Miles (70 000 km) 0Change engine oil and filter (or every 3 months, whichever occursfirst). An Emission Control Service. 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 0Inspect air cleaner filter if you are driving in dusty conditions. Replacefilter if necessary. An Emission Control Service. (See footnoteJf.) I r DATE SERVICED ACTUAL MILEAGE I I BY: I DATE SERVICED ACTUAL MILEAGE BY: 7-14