I thought that the 230 mpg estimate for the Chevy Volt and the 367 for the Nissan Leaf made little sense
, but at least I was hoping that it was a way to mitigate the even dumber increase in company average mpg requirements. Selling a few Volts getting 230 mpg could have gone a long ways over coming the big increase in mpg rules imposed by the Obama administration.
When the figures came out, many observers argued that they presented an inflated and meaningless comparison for consumers looking to measure the efficiency of battery-powered cars against their gas-powered counterparts. The extent of backlash took the agency by surprise, the people familiar said.
The mileage expectation reflected a new methodology for electric and plug-in hybrid cars that factored in electricity used to try to reach a miles-per-gallon equivalent. The intent is to allow consumers to measure the vehicles against traditional gasoline-powered ones. The final figures will do the same, but the EPA is trying to come up with better ways to compare electric power with gasoline.
To calculate a miles-per-gallon figure for a vehicle that runs either partially or fully on battery power, GM had cited an EPA formula that attempts to convert electric-energy consumption into a gasoline equivalent. The Department of Energy process cited by Nissan considers 82 kilowatt hours of electricity to be equivalent to one gallon of gasoline. . . .
Labels: efficiency, Environment, EPA