Like many fuel - saving technologies, automakers are rewarded for adding these types of systems in the highly complex government Corporate Average Fuel Economy ratings system and the rewards can add up. (bestride.com)
These electric cars are meant to lower a company's corporate average fuel economy ratings and to help green up its image in the eyes of consumers. (cnet.com)
The 335d, which provides a city / highway average fuel economy rating of 29 mpg, is eligible for an «alternative vehicle» credit of $ 900. (hybridcars.com)