2003 Buick Regal Owner's Manual - Page 308

50,000Miles (83 000 km) 0 Change automatic transaxle fluid and filter if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, change thefluid and filter at 100,000 miles (166 000 km). 0 For supercharged engines only: Check the supercharger oil level and add the proper supercharger oil as needed (or every 36 months, whichever occurs first). See Part D: Recommended Fluids and Lubricants on page 6- 15. An Emission Control Service. (See footnote f.) 0 Rotate tires. See Tire lnspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) U Replace engine air cleaner filter. An Emission Control Service. 67,500 Miles (1 12 500 km) 0 Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 52,500Miles (87 500 km) 0 Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 75,000 Miles (125 000 km) U Inspect engine air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote f.) 0 Replace passenger compartment air filter. If you 60,000 Miles (1 00 000 km) U Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. drive regularly under dusty conditions, the filter may require replacement more often. U Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 6-7