Ford 2014 FUSION HYBRID Owner's Manual page 150

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Unique Driving Characteristics
Question
Why does my engine rev up so high some-
times when I accelerate?
What is the fan noise I hear from the rear
of my hybrid?
What is the engine oil change service
interval?
Can I put E15 or E85 in my vehicle, and how
will it affect my fuel economy?
How long will my high voltage battery last?
Does it need maintenance?
Can you charge the battery with a plug into
an A/C outlet?
Can I tow the hybrid behind my motor home
with all four wheels down?
Your vehicle's engine and transmission are
designed to deliver the power you need at
the most efficient engine speed. This may
be higher than expected during heavy
accelerations, and may fluctuate during
steady state driving. These are character-
istics of the Atkinson engine cycle and the
transmission technology that help
maximize your hybrid's fuel economy.
The fan noise comes from a fan located
outside the high voltage battery. This fan
turns on when the battery requires cooling
air. The fan speed, and associated noise
level, will change according to the amount
of cooling required to maintain good
performance. Maintaining the battery
temperature at optimal conditions also
prolongs the useful life of the battery and
helps to achieve better fuel economy.
Change the engine oil every 10000 miles
(16000 km) or once per year under normal
operating conditions.
Your hybrid vehicle can use E15 (15%
ethanol, 85% gasoline) fuel, but you may
notice slightly reduced fuel economy
because ethanol contains less energy per
gallon than gasoline. Your hybrid vehicle is
not designed to use E85 (85% ethanol).
The high voltage battery system is designed
to last the life of the vehicle and requires
no maintenance.
There are no provisions for charging the
high voltage battery from a power supply
external to the vehicle. (For Fusion Energi
vehicles, the vehicle can be plugged into a
110-volt outlet with charge cord provided.)
Yes. Your hybrid vehicle can be flat towed
without modification. See Towing (page
147
Answer
213).

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