Page 452 of 475

Protecting Your Investment
Maintenance is an investment that will pay dividends in the form of
improved reliability, durability and resale value. To maintain the proper
performance of your vehicle and its emission control systems, it is
imperative that scheduled maintenance be completed at the designated
intervals.
Your vehicle is equipped with the Intelligent Oil-Life Monitor (IOLM)
system which displays a message in the information display at the proper
oil change service interval; this interval may be up to one year or
10000 miles (16000 kilometers). When ENGINE OIL CHANGE DUE or
OIL CHANGE REQUIRED appears in the information display, it is time
for an oil change; the oil change must be done within two weeks or
500 miles (800 kilometers) of the ENGINE OIL CHANGE DUE or OIL
CHANGE REQUIRED message appearing. The Intelligent Oil-Life Monitor
must be reset after each oil change; see theInformation Displays
chapter.
If your information display is prematurely reset or becomes inoperative,
you should perform the oil change interval at six months or 5000 miles
(8000 kilometers) from your last oil change. Never exceed one year or
10000 miles (16000 kilometers) between oil change intervals.
Your vehicle is very sophisticated and built with multiple, complex,
performance systems. Every manufacturer develops these systems using
different specifications and performance features. That is why it is
important to rely upon your dealership to properly diagnose and repair
your vehicle.
Ford Motor Company has recommended maintenance intervals for
various parts and component systems based upon engineering testing.
Ford Motor Company relies upon this testing to determine the most
appropriate mileage for replacement of oils and fluids to protect your
vehicle at the lowest overall cost to you and recommends against
maintenance schedules that deviate from the scheduled maintenance
information.
Ford strongly recommends the use of only genuine Ford, Motorcraft or
Ford-authorized remanufactured replacement parts because they are
engineered for your vehicle.
Additives and Chemicals
Ford Motor Company recommended additives and chemicals are listed in
the owner manual and in the Ford Workshop Manual. Additional
chemicals or additives not approved by Ford Motor Company are not
recommended as part of normal maintenance. Please consult your
warranty information.
Scheduled Maintenance 451
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 456 of 475

NORMAL SCHEDULED MAINTENANCE AND LOG
Intelligent Oil-Life Monitor®
Your vehicle is equipped with an Intelligent Oil-Life Monitor that
determines when the engine oil needs to be changed based on how your
vehicle is used. By using several important factors in its calculations, the
monitor helps reduce the cost of owning your vehicle and reduce
environmental waste at the same time. This means you won’t have to
remember to change the oil on a mileage-based schedule; the vehicle lets
you know when an oil change is due by displaying ENGINE OIL
CHANGE DUE or OIL CHANGE REQUIRED in the information display.
The following table is intended to provide examples of vehicle use and
its impact on engine oil change intervals; it is provided as a guideline
only. Actual engine oil change intervals depend on several factors and
generally decrease with severity of use.
When to expect the OIL CHANGE REQUIRED messageInterval Vehicle use and examples
7500-10000 miles
(12000-16000 km) Normal
– Normal commuting with highway driving
– No, or moderate, load or towing
– Flat to moderately hilly roads
– No extended idling
5000-7499 miles
(8000-11999 km) Severe
– Moderate to heavy load or towing
– Mountainous or off-road conditions
– Extended idling
– Extended hot or cold operation
3000-4999 miles (4800-7999 km) Extreme
– Maximum load or towing
– Extreme hot or cold operation
Scheduled Maintenance 455
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 459 of 475
Maintenance Schedule Log
DEALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
458 Scheduled Maintenance
2015 Navigator (nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 460 of 475
DEALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
Scheduled Maintenance 459
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 461 of 475
DEALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
460 Scheduled Maintenance
2015 Navigator (nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 465 of 475
Special Operating Condition Log
DEALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
464 Scheduled Maintenance
2015 Navigator (nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 466 of 475
DEALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
Scheduled Maintenance 465
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)
Page 468 of 475
ENGINE COOLANT CHANGE RECORD
Initial change Six years or 100000 miles (160000 km)(whichever comes first)
After initial change Every three years or 50000 miles (80000 km)
Engine Coolant Change Log
DEALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE: D
EALERVALIDATION:
P&A C
ODE:
RO#: HOURS:
DAT E:MILEAGE:
Scheduled Maintenance 467
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)