1996 Buick Century Owner's Manual - Page 289

I Short TripKity Maintenance Schedule I 69,000 Miles (115 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 72,000 Miles (120 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. Lubricate the 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). DATE ACTUAL MILEAGE SERVICED B Y DATE ACTUAL MILEAGE SERVICED BY: 7-19