97% of US buyers opted for 2.5L stop/start base engine on 2014, 2015 Malibu
Green Car Congress
JULY 23, 2014
An auxiliary battery powers electric accessories such as the climate system, power windows and radio during engine restarts. The stop/start system in the Impala improves city fuel economy by 5%, or one mpg for an EPA-estimated 22 miles per gallon (10.7 The 2015 Impala is available for sale now. Earlier post.)
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