This weekend's competition in Wisconsin is a bit more intense than it was in your grade school gym class.
More drivers are turning to natural gas vehicles because the fuel is half as expensive as gasoline is at the pumps right now.
There aren’t too many natural gas models out there and there are only about 500 public fueling stations around the country. But drivers can convert their existing cars to take natural gas fuel and they can set up fueling stations at home.
What are these cars like to drive and own?