Driving To Optimize Fuel Economy - Ford 2013 C-MAX HYBRID Owner's Manual

186 Unique Driving Characteristics
Engine: The engine speed in your hybrid is not directly tied to your
vehicle speed. Your vehicle's engine and transmission are designed to
deliver the power you need at the most efficient engine speed. During
heavy accelerations, your hybrid may reach high engine speeds (up to
6000 rpm).
In prolonged mountainous driving, you may see the engine tachometer
changing without your input. This is intentional and maintains the
battery charge level. You may also notice during extended downhill
driving that your engine continues to run instead of shutting off.
During this engine braking, the engine stays on, but it's not using any
fuel. You may also hear a slight whine or whistle when operating your
vehicle. This is the normal operation of the electric generator in the
hybrid system.
During certain events (such as vehicle servicing) your low voltage
(underhood) battery may become disconnected or disabled. Once the
battery is reconnected and after driving the vehicle, the engine may
continue to operate for three to five seconds after the key is turned to
off. This is a normal condition.
Braking: Your hybrid is equipped with standard hydraulic braking and
regenerative braking. Regenerative braking is performed by your vehicle
computer housed with the transmission and it commands a portion of
the brake energy stored in your high voltage battery.

Driving to Optimize Fuel Economy

Note: Having your engine running is not always an indication of
inefficiency. In some cases, it is actually more efficient than driving in
electric mode.
Your fuel economy should improve throughout your hybrid's break-in
period. As with any vehicle, fuel economy can be significantly impacted
by your driving habits, accessory usage, temperature and terrain.
For best results, keep in mind these tips:
• Keep the tires properly inflated and only use the recommended size.
• Aggressive driving increases the amount of energy required to move
your vehicle. In general, better fuel economy is achieved with mild to
moderate acceleration and deceleration. Moderate braking is
particularly important since it allows you to maximize the energy
captured by the regenerative braking system.
2013 C-Max Full Hybrid (34h)
Owners Guide gf, 3rd Printing, January 2013
USA (fus)