1997 Ford Explorer Scheduled Maintenance Guide 1st Printing - Page 4

General maintenance information Wheel lug nuts Wheel lug nuts must be retightened to proper torque specifications at 800 km (500 miles) of new vehicle operation. Proper torque specifications are provided in your "Owner's Guide." Also retighten to proper torque specifications at 800 km (500 miles) after: 1. any wheel change, or 2. any other time the wheel lug nuts have been loosened. PRE-DELIVERY SERVICE CHECK u Pre-Delivery Service Inspection Completed DEALER AUTHORIZATION Date: Mileage: WHAT MAINTENANCE SCHEDULE SHOULD YOU FOLLOW? Normal schedule Follow the Normal schedule for most everyday driving conditions. Severe duty schedule Follow the Severe Duty Schedule if your driving habits frequently include one or more of the following conditions: u Towing a trailer or carrying a heavy load. u Operating in severe dust conditions. u Extensive idling, such as police, taxi or door-to-door delivery service. u Off-road operation. u Short trips of less than 16 km (10 miles) when outside temperatures remain below 18°C (0°F). Idling the engine for extended periods will accumulate more hours of use on your vehicle than is actually indicated by the odometer. Consequently, the odometer reading can often be misleading when determining the right time to change you engine oil and filter. If you are using your Ford vehicle in a manner which allows it to remain stationary while the engine is running for long periods (door-to-door delivery, taxi, police, power/utility company trucks or similar duty), then 4