It’s been a few months since the Mitsubishi i became America’s most fuel-efficient car. Now, Mitsubishi’s electric affordable small car earns a new honor, as it tops the American Council for an Energy-Efficient Economy’s 2012 Greenest Vehicle List.

“The ‘Greenest’ list saw a considerable shake-up this year, with the Mitsubishi i-MIEV battery electric vehicle claiming the top spot from the Honda Civic Natural Gas, which has held on to first place for eight years in a row,” says ACEEE in a press release. “Making its model year 2012 debut on the American market, the i-MIEV earns a score of 58, the highest Green Score awarded since the rankings began in 1998.”

The Civic Natural Gas and Nissan Leaf tied for second place with Green Scores of 55, while the Toyota Prius, Honda Insight, Smart ForTwo, Scion iQ, Honda Civic Hybrid, Lexus CT 200h, Toyota Camry Hybrid LE, Honda CR-Z and Toyota Yaris rounded out the Greenest List for 2012.

On the opposite end of the spectrum, the ACEEE’s Meanest List was topped by the Chevrolet G3500 Express and GMC G3500 Savana cargo vans, which tied for first place. GM’s van siblings were followed closely by the Ford E-350 van and the Bugatti Veyron exotic sports car.

Despite the Mitsubishi’s green credentials, some say that it may not be the best choice for green car shoppers. “While the Mitsu is at the top of the green heap this year, it's a boutique car that's not intended to be a volume seller,” writes Edmunds. “But there are other highly efficient cars and trucks that consumers with a green bent can consider, and ratings like the ACEEE guide help draw attention to them.”

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