Ford 2015 F-150 Owner's Manual page 511

Operating in dusty or sandy conditions (such as unpaved or dusty roads)
Inspect frequently, service
as required
Every 5,000 mi (8,000 km)
Every 5,000 mi (8,000 km)
or six months
Every 60,000 mi
(96,000 km)
*
Reset your Intelligent Oil-Life Monitor after each engine oil and filter change.
Inspect frequently, service
as required
Every 5,000 mi (8,000 km)
or six months
Every 30,000 mi
(48,000 km)
Every 60,000 mi
(96,000 km)
*
Reset your Intelligent Oil-Life Monitor after each engine oil and filter change.
Every oil change interval
F-150 (TFC) Canada/United States of America, enUSA, Fourth Printing
Scheduled Maintenance
Replace engine air filter.
Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.
Rotate tires, inspect tires for wear and measure tread
depth.
Change engine oil and filter.
Change transfer case fluid (Four-wheel drive vehicles).
Off-road operation
Inspect steering linkage, ball joints and U-joints. Lubricate
if equipped with grease fittings.
Replace engine air filter.
Change engine oil and filter.
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).
Change transfer case fluid (Four-wheel drive vehicles).
Exclusive use of E85 (Flex fuel vehicles only)
If ran exclusively on E85, fill the fuel tank full with regular
unleaded fuel.
*
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