1997 Ford Explorer Owner Guide 1st Printing - Page 205

Maintenance and care though your engine will perform adequately on other gasolines, the performance of the emission control devices and systems may be adversely affected. Repair of damage caused by using a fuel that your vehicle was not designed for may not be covered by your warranty. Calculating fuel economy To accurately calculate your vehicle's fuel economy: 1. Fill the tank completely and record the initial odometer reading. 2. Each time you fill the tank, record the amount of fuel added (in liters or gallons). 3. After at least three to five fuel tank fill-ups, fill the fuel tank and record the current mileage reading. 4. Use one of the following equations to calculate fuel economy. Liters used x 100 Ϭ Total kilometers traveled Total miles traveled Ϭ Total gallons used Keep a record for at least one month. This will provide an accurate estimate of the vehicle's fuel economy. EMISSION CONTROL SYSTEM Your vehicle is equipped with various emission control 206