1993 Buick Park Avenue Owner's Manual - Page 300

Scheduled Maintenance Services Schedule I Follow Schedule I if your car is MAINLY driven under one or more of the following conditions: 0 When most trips are less than 4 miles (6 kilometers). 0 When most trips are less than 10 miles (16 kilometers) and outside temperatures remain below freezing. 0 When most trips include extended idling and/or frequent low-speed operation as in stop-and-go traffic. 0 Towing a trailer."? 0 When operating in dusty areas. Schedule I should also be followed if the car is used for delivery service, police, taxi or other commercial applications. TO BE SERVICED (See Explanation of Scheduled Maintenance Services Following Schedules I and 11) - Item No. 1. Engine Oil & Oil Filter Change* 2. Chassis Lubrication 3. Throttle Body Mounting Bolt Torque* 4.Tire & Wheel Inspection & Rotation 5. Engine Accessory Drive Belt(s) Inspection*