Ann Arbor, MI, Apr 17, 2009 — Chances are, you haven't bought a new car this year. Auto sales are down across the board, including in the small car and electric-gas hybrid markets. Now some dealers and automakers are proposing a way to move some of those more fuel efficient cars: increase the gas tax. Samara Freemark explains why the same people who sell cars might want to make driving them more expensive.