The X-prize Foundation showcases and rewards cutting-edge innovations in fields that have the potential to benefit humanity. The Automotive X-prize is for fuel efficiency is sponsored by the Progressive insurance company and partially funded by the Department of Energy.
Edison2’s Very Light Car No. 98
Fuel economy: 102.5 mpg
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Li-ion Motors Corp.’s Wave II
Fuel economy: 187 MPGe
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X-Tracer Team Switzerland’s E-Tracer No. 79

Fuel economy: 205.3 MPGe
Source: CNN/Money