Ford F-150 Owner's Manual page 468

Scheduled Maintenance
Edge/MKX AWD only – vehicles operating off-road in sand during high
ambient temperatures must replace the AWD PTU (All-wheel drive
Power Transfer Unit) lube every 20,000 miles (32,000 km).
Engine air filter & cabin air filter replacement: Engine air filter and
cabin air filter life is dependent on exposure to dusty and dirty
conditions. Vehicles operated in these conditions will require frequent
inspection and replacement of the engine air filter and cabin air filter.
ENGINE COOLANT CHANGE RECORD
Initial change
After initial change
Initial change
After initial change
468
2012 F-150 (f12)
Owners Guide, 2nd Printing
USA (fus)
3.5L, 3.7L and 5.0L engines
6 years or 100,000 miles (160,000 km)
(whichever comes first)
Every 3 years or 50,000 miles (80,000 km)
6.2L engine
6 years or 105,000 miles (168,000 km)
(whichever comes first)
Every 3 years or 45,000 miles (72,000 km)