Ford 2016 C-MAX HYBRID Owner's Manual page 144

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?
C-MAX (CCG) Canada/United States of America, enUSA, First Printing
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 when
driving at a steady speed. These are charac-
teristics 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
next to the high voltage battery pack. 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 kilometers) 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 C-MAX 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
141
Answer
190).