Fuel Economy / MPG » 7
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GREEN | 7 out of 10
General Motors has installed a modern, up-to-date powertrain into its mid-size Impala for 2012, but it's not really any more fuel-efficient than last year's model.
A new 300-horsepower, 3.6-liter V-6 and six-speed automatic transmission might give the Impala a more modern, refined character, but they do little or nothing for the benefit of gas mileage, surprisingly. EPA fuel economy ratings for actually go down one in the city--from 19 mpg to 18--but its highway rating rises by one, to 30 mpg.The Impala remains E85 (85 percent ethanol) compatible, although running on the fuel it gets just 13/22.
A more modern engine and transmission don't really improve the Impala's gas mileage.