Chevrolet Volt Concept Preview – 2007 Detroit Auto Show: Company pitchman, Bob Lutz, calls it his company’s own little “inconvenient truth.” Referring to the recent environmental flick, GM’s most recognizable executive implied that the Chevrolet Volt concept car, which runs primarily on electricity with flex-fuel engine assist only after the 40-mile range has been exceeded, might be an inconvenient truth for those who demonize companies like his. In a best case scenario, commuters could travel to and from work without ever needing the engine’s assistance, meaning they wouldn’t need to buy, or burn, any fossil fuel. That’s a claim which should sound like music to the ears of commuters everywhere, and maybe even Al Gore.