Reprogrammed Cobalt gets 5 more mpg
General Motors has reprogrammed the Chevrolet Cobalt with "engine mapping, lower roller resistance tires and perhaps some gearing adjustments" (autoblog) to squeeze out 5 more miles per gallon. It jumps from 31 to 36 mpg on the highway and increases just shy of that difference in the city. The thriftier Cobalt gets a badge that says XFE
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