"D" - Operating In Dusty Conditions

When operating in dusty conditions such as unpaved or dusty roads:

- Change engine oil and install a new oil filter every 8,000 km (5,000 mi) or 6 months.
- Inspect and rotate tires every 8,000 km (5,000 mi).
- Install a new fuel filter every 24,000 km (15,000 mi) (not required for Fusion, Milan, MKZ, Edge, MKX, Freestyle, Five Hundred and Montego).
- Change automatic transmission fluid (not required on 6R60/6R75 transmissions) every 48,000 km (30,000 mi).
- Check the air restriction gauge, install new filter as required (PZEV Focus only) every 48,000 km (30,000 mi).
- Change rear axle lubricant every 80,000 km (50,000 mi) (E-450 and F-450/550 only).
- Change transfer case fluid every 96,000 km (60,000 mi).
- Install a new engine air filter as required.
- Install a new cabin air filter as required (if equipped).