1996 Ford F250 Owner's Manual - Page 392

Engine u Start engine every 15 days. Run at fast idle the gears while the engine is running. until it reaches normal operating temperature. u With your foot on the brake, shift through all Fuel system u Fill fuel tank with high-quality unleaded fuel until the first automatic shutoff of the fuel pump nozzle. NOTE: During extended periods of vehicle storage (60 days or more), fuel may deteriorate due to oxidation. This can damage rubber and other polymers in the fuel system and may also clog small orifices. Ford Gas Stabilizer should be added whenever actual or expected storage periods exceed 60 days. Follow the instructions on the label. The vehicle should then be operated at idle speed to circulate the additive throughout the fuel system. NOTE: Read the 7.3L Diesel Engine Owner Guide Supplement for information regarding vehicle storage for your diesel-powered vehicle. A volatile corrosion inhibitor added to the fuel system will protect the fuel system's inner surfaces from corrosion. Follow the instructions packaged with the product. Cooling system u Protect against freezing temperatures. 393