15000 MI or 24000 KM

Inspect
    Cooling System
      Inspect engine cooling system, hoses and clamps; check coolant strength every 15,000 miles (24,000 km). For 7.3L DIT Diesel Engines, add 8-10 oz. (237-295 ml) of FW-15 to the engine coolant every 15,000 miles (24,000 km).
Replace
    Oil Filter, Engine
    Fuel Filter
      Replace fuel filter every 15,000 miles (25,000 km)(7.3L DIT Diesel only).
    Engine Oil
Service or Charge
    Coolant
      For 7.3L DIT Diesel Engines, add 8-10 oz (237-295 ml) of FW-15 to the engine coolant every 15,000 miles (24,000 km).
Rotate
    Tires
      Rotate tires and adjust air pressure. (1) Wheel lugnuts must be retightened to proper torque specifications at 500 miles (800 km) of new vehicle operation (100 miles/160 km and 500 miles/800 km for vehicles equipped with dual rear wheels or equipped for snowplowing. Also retighten to proper torque specification 500 miles (800 km) after any wheel change or any other time the wheel lug nuts have been loosened. On dual rear wheel vehicles, rotate the front tires side to side without disturbing the rear tires.