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I took a ride this morning through downtown Detroit in a 30+ mpg Equinox. Originally, the 2005 Equinox got 25 mpg on the highway and 19 in the city. Two Michigan Technological University seniors represented their school at a ride and drive event at GM's headquarters for the Challenge X while the SAE Congress was going on down the street at Cobo Hall. Todd Cimermancic, team leader, and Doug Sarsen, who is in charge of the powertrain, have both been working on the MTU vehicle since this Challenge

The three-year Challenge X program from GM will end in May with a championship announcement in Washington, D.C. 17 student teams are adding biofuel, hybrid, PHEV and/or hydrogen fuel cell propulsion systems to the Equinoxes. Before the student get to find out who's re-engineered a Chevy Equinox into the best green ride, there are still tests to run and promotion to be had.