I was reminded of this old thread when I read about the new "segment first" stop/start system in the 2014 Chevrolet Malibu...
Apparently, the EPA cycles now reveal the benefits of such systems, because it shows up in the Malibu's MPG rating. It even affects the highway rating:
Quote:
[The] 2014 Malibu powered by the new 196 bhp (145 kW) 4-cylinder 2.5-liter EcoTec engine is the first car in its segment to come as standard with stop/start technology improving city mileage by 14 percent and highway efficiency by 6 percent
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The car is EPA rated 25 mpg city and 36 mpg highway.