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Fuel efficiency has been a hot topic as of late, both for consumers looking to ease their financial and environmental burdens and for automakers hoping to meet the latest round of government-mandated mileage requirements. A few months ago in late March – importantly, that means the survey was conducted before the major disaster and oil spill in the Gulf – the Consumer Federation of America found that most U.S. citizens support a major shift towards increased fuel mileage standards.

Eight months ago, General Motors made a huge deal about how the Chevrolet Volt will get 230 miles per gallon. Of course, the company admitted that this isn't what drivers will actually experience when they use the car, just that the Volt is "expected to achieve city fuel economy of at least 230 miles per gallon, based on development testing using a draft EPA federal fuel economy methodology for labeling for plug-in electric vehicles."