Answer
Question
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.
Why does my engine rev up so high
sometimes when I accelerate?
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.
What is the fan noise I hear from the rear
of my hybrid?
Running out of gas is not recommended.
However, you may be able to go about one
mile, driving at 30 mph (48 km/h), if the
battery has a normal state of charge.
How far can I go in Electric Drive if I run out
of gas?
Change the engine oil every 10000 miles
(16000 km) under normal operating condi-
tions. See Scheduled Maintenance (page
What is the engine oil change service
interval?
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).
Can I put E15 or E85 in my vehicle, and how
will it affect my fuel economy?
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MKZ (CC9)
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