1997 Buick Riviera Owner's Manual - Page 338

I Short Trip/City Maintenance Schedule I 96,000 Miles (160 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 93,000 Miles (155 000 km) 0Change engineoil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0Lubricate chassis components (or every 6 months, whichever occurs first). (See footnote#.) 0Rotate tires. See "Tire Inspection and Rotation" in the Index proper rotation for pattern and additional information. (See footnote+.) DATE ACTUAL MILEAGE SERVICED BY: I DATE I ACTUAL MILEAGE ISERVICED BY: I