UW Madison engineering students are in a national vehicle competition that's winding down this weekend. The UW Madison team is among 17 schools to re-engineer a 2005 Chevrolet Equinox, using advanced propulsion technologies to increase fuel efficiency and reduce environmental impact. Team Leader Dan Mehr Mehr says it's been a challenge getting all the components biodiesel-electric hybrid entry to work together smoothly. This is the last year of Challenge X, a four year competition sponsored by the Department of Energy and General Motors. The UW team finished in second place last year.