This mode is designed to sustain the battery's charge through excessively hilly terrain, but some owners have speculated that by using mountain mode for long cruises above 50 mph (the cap of the electric motor's
optimum efficiency) and saving the 35 miles of battery power for the low - speed city segments at the beginning and end of a long trip, the driver can
get closer to eking maximum
efficiency out of the Volt.
For the 2014 model year, the
Optima Hybrid
gets several updates, including restyled front and rear fascias that were optimized to increase aerodynamic
efficiency, new wheel designs, and unique grille and lighting elements.