1998 Buick Century Owner's Manual - Page 333

I Maintenance Schedule I 0 Rotate tires. See"Tire Inspection and Rotation" in the Index for proper +.) rotation pattern and additional information. (See footnote 90,000 Miles (150 000 km) 0 Check Oil LifeMonitor. If engine oiland filter are changed, reset monitor. See Index. "Engine in the An Emission Control Service. (See footnote *.) 0 Replace passenger compartmentair filter. 0 Replace air cleanerfilter. An Emission Control Service. Inspect fueltank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace partsas needed. An Emission Control Sewice. (See footnote?.) 0 Rotate tires. See"Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information.(See footnote +.) MLLEAGE 97,500 Miles (162 500 km) 0 Check Oil Life Monitor. If engine oil and filter are changed,resel .onitor. See Index. in the "Engine An Emission Control Service. (See footnote *.) 0 Rotate tires. See"Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) MILEAGE