Dense fog advisory in effect for Walworth, Rock counties until 9 a.m.

Students work to create car that gets 3,500 miles per gallon

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How would you like your car to get 3,500 miles per gallon? That's the benchmark for students competing at the Shell Eco-Marathon in downtown Houston this weekend. Over 100 students from 57 high schools and 75 universities are taking part -- including an all-star group from the Milwaukee School of Engineering.