solely on electricity. Because the Volt can travel on batteries alone, GM argued that most drivers with a daily commute of less than that distance would drive only in electric mode, so long as they recharged their vehicle at work or at home overnight. The EPA official rating issued in November 2010 included separate fuel economy ratings for all-electric mode and gasoline-only mode, with an overall combined city/highway gasoline-electricity fuel economy rating of equivalent (MPG-e). To address the variability of the fuel economy outcome depending on miles driven between charges, EPA also included in the Volt's fuel economy label a table showing fuel economy and electricity consumed for five different scenarios driven between a full charge, and a never-charge scenario. According to this table the Volt's fuel economy goes up to equivalent (MPG-e) if driven between full charges. Also, in recognition of the multiple operating modes that a plug-in hybrid can be built with (all-electric, blended, and gasoline-only), for the new fuel economy and environment label that will be mandatory in the U.S. beginning in model year 2013, EPA and the National Highway Traffic Safety Administration (NHTSA) issued two separate fuel economy labels for plug-in hybrids. One label is for extended-range electric vehicles, like the Chevy Volt, with two modes: all-electric and gasoline-only; and a second label for blended mode that includes a combination of all-electric, gasoline and electric operation, and gasoline only, like a conventional hybrid vehicle. EPA fuel economy rating In August 2009, General Motors released its estimated city fuel economy rating for the Volt of of gasoline plus of electricity using the EPA's proposed method for evaluating plug-in hybrids. The U.S. Environmental Protection Agency (EPA) issued a statement clarifying that the "EPA has not tested a Chevy Volt and therefore cannot confirm the fuel economy values claimed by GM." In July 2010, GM explained that their estimate was based on a formula that had not been officially approved and that they had been awaiting the EPA's decision on how the equivalent fuel economy of plug-in hybrids would be estimated. The official EPA rating was issued in November 2010 and became the agency's first fuel economy label for a plug-in hybrids. The EPA rated the 2011 Volt combined fuel economy at in all-electric mode, and in gasoline-only mode, for an overall combined fuel economy rating of equivalent. The label also shows the combined city-highway fuel economy in all-electric