1995 Buick Riviera Owner's Manual - Page 280

I MaintenanceSchedule I I 9,000 Miles (15 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Sewice. 6,000 Miles (10 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0Lubricate the suspension and steering linkage, transaxle shift linkage, parking brake cable guides and the underbody contact points and 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. ACTUAL MILEAGE DATE SERVICED BY: DATE ACTUAL MILEAGE SERVICED BY: 7-7