Ford F-250 Owner's Manual page 429

Extensive idling and/or low-speed driving for long distances as in heavy
commercial use such as delivery, taxi, patrol car or livery
Inspect frequently, service as
Every 5,000 miles (8,000 km) – Inspect brake system
Every 5,000 miles (8,000 km) or
Every 5,000 miles (8,000 km),
6 months or 200 hours of engine
Every 15,000 miles (24,000 km) – Replace fuel filter (Ranger)
Every 30,000 miles (48,000 km) – Change automatic transmission fluid (except 6R80 and
Every 60,000 miles (96,000 km) – Change transfer case fluid (4WD vehicles)
2011 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)
Scheduled Maintenance Guide
– Replace cabin air filter (if equipped)
required
– Replace engine air filter
– Inspect wheels and related components for abnormal
noise, wear, looseness or drag
– Lubricate control arm and steering ball joints if equipped
with grease fittings
– Rotate tires, inspect tires for wear and measure tread
depth
– Inspect and lubricate U-joints
6 months
– Change engine oil and filter
operation
TorqShift transmissions)
– Replace front wheel bearing grease/grease seals if
non-sealed bearings are used (2WD vehicles)
– Replace spark plugs
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