1997 Buick Regal Owner's Manual - Page 366

I Short Trip/City Maintenance Schedule I 0For supercharged engines only: Check the supercharger oil level and add as needed oil (or every 36 months, whichever occurs first). See "Recommended Fluids and Lubricants" in this section. An Emission Control Service. (See footnote?.) 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 90,000 Miles (150 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. (See footnote *.) 0Replace air cleaner filter. An Emission Control Service. Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. An Emission Control Service. (See footnote?.) I I I 3 ACTUAL MILEAGE SERVICED B Y 7-24