1997 Buick Regal Owner's Manual - Page 373

Long Trip/Highway Maintenance Schedule ~ ~~ ~~ - I 37,500 Miles (62 500 km) I7 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?.) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. (See footnote *.) 0Rotate tires. See "Tire Inspection and Rotation" in the Indexfor proper rotation pattern and additional information. (See footnote +.) ~ I DATE ACTUAL MILEAGE SERVICED BY: DATE ACTUAL MILEAGE SERVICED BY: 7-31