What are the Mythbusters busting? According to the show's producer, they are filming an episode, to air next season ... the type of car or go-cart. Full disclosure, Jamie Hyneman help develop ...

A comment in the article said a Mythbusters episode found you could get better ... AC off, windows up = 11.7 MPG AC off, windows down = 11.3 MPG AC on, windows up = 11.7 MPG So, according to ...