Ford F-150 2010 Supplement Manual page 33

Scheduled Maintenance Guide
SPECIAL OPERATING CONDITIONS
However, if one or more of the Special Operating Conditions outlined
below better describes how you typically operate your vehicle, you will
need to perform some maintenance services more often than the Normal
Schedule recommends.
• Towing a trailer or carrying heavy loads
• Extensive idling and/or driving at low-speeds for long distances
• Driving in dusty conditions
• Off-road operation
• Use of E85 fuel 50% of the time or greater (flex fuel vehicles only)
Important: For further details and information regarding these Special
Operating Conditions see page 53.
EXCEPTIONS
Some exceptions for specific vehicles and special applications are
outlined below. In addition, you will find further information under
Exceptions on page 56.
• Engine oil and engine coolant - time and mileage based interval
If you're unsure which maintenance schedule to follow, ask your Ford
and Lincoln Mercury Dealership, or visit the Maintenance area of
www.genuineservice.com.
OILS, FLUIDS AND FLUSHING
In many cases, fluid discoloration is a normal operating characteristic
and, by itself, does not necessarily indicate a concern or that the fluid
needs to be changed. However, discolored fluids that also show signs of
overheating and/or foreign material contamination should be inspected
immediately by a qualified expert such as the factory-trained technicians
at your Ford or Lincoln Mercury Dealership. Your vehicle's oils and fluids
should be changed at the specified intervals or in conjunction with a
repair. Flushing is a viable way to change fluid for many vehicle
sub-systems during scheduled maintenance. It is critical that systems are
flushed only with new fluid that is the same as that required to fill and
operate the system, or using a Ford-approved flushing chemical.
33
2010 F-150 (f12)
Supplement, 1st Printing
USA (fus)