1999 Buick Riviera Owner's Manual - Page 321

yellowblue Short Trip/City Scheduled Maintenance for any damage. Replace parts as needed. An Emission Control Service. (See footnote[.) j For supercharged engines only: Check the supercharger oil level and add oil as needed (or every 36 months, whichever occurs first). See "Recommended Fluids and Lubricants" in this section. An Emission Control Service. (See footnote[.) j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) j Replace air cleaner filter. An Emission Control Service. j Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket 93,000 Miles (155 000 km) An Emission Control Service. j Change engine oil and filter (or every 3 months, whichever occurs first). DATE ACTUAL MILEAGE SERVICED BY: 96,000 Miles (160 000 km) An Emission Control Service. j Change engine oil and filter (or every 3 months, whichever occurs first). (Continued) DATE ACTUAL MILEAGE SERVICED BY: 7-19