1999 Buick Riviera Owner's Manual - Page 316

yellowblue Short Trip/City Scheduled Maintenance 50,000 Miles (83 000 km) (Continued) - Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). 51,000 Miles (85 000 km) An Emission Control Service. j Change engine oil and filter (or every 3 months, whichever occurs first). j Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. j Lubricate chassis components (or every 6 months, whichever occurs first). (See footnote #.) j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE ACTUAL MILEAGE SERVICED BY: 54,000 Miles (90 000 km) DATE ACTUAL MILEAGE SERVICED BY: 57,000 Miles (95 000 km) An Emission Control Service. j Change engine oil and filter (or every 3 months, whichever occurs first). 7-14 DATE ACTUAL MILEAGE SERVICED BY: