1998 Buick Riviera Owner's Manual - Page 337

75,000 Miles (125 000 km) Change engine oil and filter (or every months, whichever occurs first). 12 An Emission Control Service. 0 Lubricate chassis components (or every months, whichever occurs first). 12 #.) (See footnote 0 Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper rotation pattern and additional information. (See footnote +.) MILEAGE 82,500 Miles (137 500 km) 0 Change engine oil and filter (or every12 months, whichever occurs first). An Emission Control Service. Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) El Rotate tires. See "Tire Inspection and Rotation" in the Index proper for rotation pattern and additional information. (See footnote +.) 90,000 Miles (150 000 km) Change engine oil and filter (or every months, whichever occurs first). 12 An Emission Control Sewice. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) DATE I 7-28