45000 MI or 72000 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).