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Tuesday, people in Knoxville got a look at a new kind of car that could save money at the pump. It's called the Elio. The Elio is a three-wheeled car designed to work as a commuter car, going to and ...

What do the Elio, Aptera, Toyota i-Road concept and the spectacularly awful Zap Xebra have in common? They -- and many more small-volume economical vehicles and concepts besides -- all use one fewer ...