"I" - Extensive Idling, Low-Speed, Commercial Use-Taxi, Police, Delivery

During extensive idling and/or low speed driving for long distances, as in heavy commercial use such as delivery, taxi, patrol car or livery:

- Change engine oil and install a new oil filter every 8,000 km (5,000 mi) or 6 months or 200 hours of engine operation.
- Lube front lower control arm and steering linkage ball joints with zerk fittings (if equipped) every 8,000 km (5,000 mi) or 3 months.
- Inspect brake system every 8,000 km (5,000 mi).
- 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).
- Lubricate rear wheel drive (RWD) front wheel bearings, install new grease seals and adjust bearings every 48,000 km (30,000 mi).
- Install new spark plugs every 96,000 km (60,000 mi).
- Change transfer case fluid every 96,000 km (60,000 mi).
Install a new cabin air filter as required (if equipped).uipped).