1998 Buick Riviera Owner's Manual - Page 315

Maintenance Schedule I Long Tripmighway Definition Long Tripmighway Intervals Follow this maintenance schedule only if none of the Every 7,500 Miles (12 km): Engine Oil and Filter 500 conditions from the Short Trip/City Maintenance Change (or every12 months, whichever occursfirst). Schedule is true. Do not use this schedule if the vehicle Chassis Lubrication (or every12 months, whichever is used for trailer towing, drivenin a dusty area or used occurs first). Tire Rotation. off paved roads. Usethe Short Trip/City schedule for Every 30,000 Miles (50 000 km): Supercharger Oil these conditions. Check (or every 36 months, whichever occurs first) Driving a vehicle with a f i l l y warmed engine under (3.8L Code 1 engine only).Air Cleaner Filter highway conditions causes engine o l to break i Replacement. FuelTank, Cap and Lines Inspection. down slowel: Every 50,000 Miles (83 000 k ) Automatic Transaxle m: Service (severe conditions only). Every 60,000 Miles (100 000 km): Engine Accessory Drive Belt Inspection. Every 100,000 Miles (166 k ) Spark Plug Wire 000 m : Inspection. Spark Plug Replacement. Every 150,000 Miles (240 000 km): Cooling System Service (or every 60 months, whichever occurs first). These intervals only summarize maintenance services. Be sure to follow the complete maintenance schedule on the following pages. 7-6