This week it announced that the Volt was going to get a record 230 mpg in fuel economy, launching a site, whatis230.com, to celebrate.  Many had wondered what exactly the car would get in fuel economy, given that traditional fuel economy does not cover electric engines well. 

While GM may be happy in touting the 230 mpg figure, the EPA isn't giving its full endorsement just yet. The EPA has released a statement Autoblog, stating:

EPA has not tested a Chevy Volt and therefore cannot confirm the fuel economy values claimed by GM. EPA does applaud GM's commitment to designing and building the car of the future - an American-made car that will save families money, significantly reduce our dependence on foreign oil and create good-paying American jobs. We're proud to see American companies and American workers leading the world in the clean energy innovations that will shape the 21st century economy.

GM never claimed that the EPA gave the number, but it also never really explained where it came from, leaving the possibility unanswered.  Given that GM's marking campaign is heavily using the figure as a given fact, it would be a major blow to GM if the EPA decides to rate it at less that 230 mpg.

When contacted for comment, GM says it's sticking to the 230 mpg figure.  It says the number is essential to show people just how different the Volt is.  GM's spokesperson also expressed confidence that the EPA would certify it at at least 230 mpg when the car undergoes full testing.

In perhaps a sign of bragging matches to come, GM's announcement yesterday was followed by claims from Nissan that its Leaf electric vehicle, gets 367 mpg.  The Leaf is also a 2011 model, set to compete with the Volt when it goes on sale in 2010.