(http://media.il.edmunds-media.com/mitsubishi/i/2012/ns/2012_mitsubishi_i_actf34_ns_111711_196.jpg) The 2012 Mitsubishi i is the biggest winner in the fuel-economy race, while the 2012 Bugatti Veyron is the biggest loser, according to the EPA's new fuel-economy guide.
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