1997 Buick Century Owner's Manual - Page 357

7,500 Miles (12 500 km) The services shown in this schedule up to 100,000 miles m should be performed after 100,000 miles (166 000 k ) (166 000 km) at the same intervals. The services shown at 150,000miles (240 000 k ) m should be performed at the same interval after 150,000 miles (240 000 km). See "Owner Checks and Services" and "Periodic Maintenance Inspections" following. Change engine oil and filter (or every 12 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 +.) Footnotes The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform 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 the maintenance be recorded. DATE ACTUAL MILEAGE SERVICED BY: + 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.