1995 Buick Century Owner's Manual - Page 267

I MaintenanceSchedule I I 9,000 Miles (15 000 km) C Change engine oil and filter (or every l 3 months, whichever occurs first). Arz Emission Control Service. 6,000 Miles (10 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. Cl Lubricate the transaxle shift linkage, parking brake cable guides, underbody contact points and linkage. If equipped with grease fittings, lubricate the suspension and steering linkage (or every 6 months, whichever occurs first). 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. DATE ACTUAL MILEAGE SERVICED BY: 7-7