1997 Buick Riviera Owner's Manual - Page 350

1 Long Trip/Highway Maintenance Schedule rn 97,500 Miles (162 500 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 100,000 Miles (166 000 km) 0Inspect spark plug wires. An Emission Control Service. 17 Replace spark plugs. An Emission Control Service. 0Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote#.) 0Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper rotation pattern and additional information. (See footnote+.) 0Change automatic transaxle fluid and filter if the vehicleis mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches O F 90 (32 O C) or higher. - In hilly or mountainous terrain. DATE ACTUAL MILEAGE SERVICED BY: (Continued) n en