Whoa there. I never said it was "environmentally friendly". That is indeed ridiculous. Just saying that for the amount of power it has, it gets better than expected gas mileage.

Also, it looks like a 1970s Datsun 240Z averages significantly worse: http://www.fuelly.com/car/datsun/240z/1973 - further proving my point, and the one of the article in question.