In the wake of Ford's Alan Mullaly announcing that the Ka may yet come to America, General Motors' Fritz Henderson threw a big wet towel on the idea that his company might follow suit with the Beat. Meanwhile ex-F1 designer Gordon Murray has been working on a new micro-car of his own. Photos on his company's web site give the first hint about its size and shape. As the Audi Mileage rolls on in its second week, ABG takes a look at some of the strategies employed by participants to improve efficiency and how effective they were.

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