1997 Buick Century Owner's Manual - Page 364

m g Trip/Highway Maintenance Schedule I 82,500 Miles (137 500 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 90,000 Miles (150 000 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0Rotate tires. See "Tire Inspection and Rotation" in theIndex for proper rotation pattern and additional information. (See footnote +.) 0Replace passenger compartment air filter. 0Replace air cleaner filter. An Emission Control Service. 0Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace partsas needed. An Emission Control Service. (See footnote?.) 0Rotate tires. See "Tire Inspection and Rotation" in the Index proper rotation for pattern and additional information. (See footnote +.) DATE SERVICED ACTUAL MILEAGE DATE MILEAGE ACTUAL SERVICED BY BY 7-34