FORD 2015 F-150 - Manual (Page 528)

Operating in dusty or sandy conditions (such as unpaved or dusty roads)
Replace engine air filter. Inspect frequently, service
as required
Inspect the wheels and related components for abnormal
noise, wear, looseness or drag. Every 5000 mi (8,000 km)
Rotate tires, inspect tires for wear and measure tread
depth.
Change engine oil and filter. *
Every 5000 mi (8,000 km)
or six months
Change transfer case fluid (Four-wheel drive vehicles). Every 60000 mi
(96,000 km)
* Reset your Intelligent Oil-Life Monitor after each engine oil and filter change.
Off-road operation
Inspect steering linkage, ball joints and U-joints. Lubricate
if equipped with grease fittings. Inspect frequently, service
as required
Replace engine air filter.
Change engine oil and filter. *
Every 5000 mi (8,000 km)
or six months
Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.
Rotate tires, inspect tires for wear and measure tread
depth.
Replace front wheel bearing grease and grease seals if
non-sealed bearings are used (Two-wheel drive vehicles). Every 30000 mi
(48,000 km)
Change transfer case fluid (Four-wheel drive vehicles). Every 60000 mi
(96,000 km)
* Reset your Intelligent Oil-Life Monitor after each engine oil and filter change.
Exclusive use of E85 (Flex fuel vehicles only)
If ran exclusively on E85, fill the fuel tank full with regular
unleaded fuel. Every oil change interval
525
F-150 (), enUSA, First Printing
Scheduled Maintenance