1997 Buick Park Avenue Owner's Manual - Page 354

I Short Trip/City Maintenance Schedule I 18,000 Miles (30 000 km) 17 Change engineoil and filter (or every 3 months, whichever occurs first). An Emission Control Service. (See footnote*.) 0Lubricate chassis components(or every 6 months, whichever occursfirst). (See footnote#.) 0Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper rotation pattern and additional information. (See footnote +.) 15,000 Miles (25 000 km) 0Change engineoil and filter (or every 3 months, whichever occursfirst). An Emission Control Sewice. (See footnote *.) 0Inspect air cleanerfilter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote?.) 7-10