1998 Buick Century Owner's Manual - Page 327

I MaintenanceSchedule I * Your vehicle has an Engine Oil Life Monitor. This monitor will show you when to change the engine oil and filter -- usually between 3,000 miles (5 000 km) and 7,500miles (12 500km) since your last oil change. Under severe conditions,the indicator may come on before 3,000miles (5 000 km). Never drive your vehicle more than 7,500 miles (12 500 km) or 12 months without an oil and filter change. The system won't detect dustin the oil. So if you drive in a dusty area,be sure to change your oil and filter if every 3,000 miles ( 5 000 km) or sooner the CHANGE OIL SOON light comes on. Remember to reset the Oil Life Monitorwhen the oil has been changed. For more information, see"Change Oil Soon Light" in the Index. The services shown in this schedule up to 100,000miles m should beperformed after 100,000 miles (166 000 k ) m at (166 000 k ) the same intervals. The services shown at 150,000 miles (240 000 km) should be performed at the same interval after150,000 miles (240 000 km). See "Owner Checks and Services" and "Periodic Maintenance Inspections" following. Footnotes ? The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure toperform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle's useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and maintenance the be recorded. + A good time to check your brakes is during tire rotation. See"Brake System Inspection" under "Periodic Maintenance Inspections'' in Part C of this schedule. 7-5