oh yeah, Ford makes some of those... The Taurus with the Vulcan engine has that option also. its basically a different kind of fuel you can run the engine on if you have it avliable in your state. Its cheaper fuel and you have 2 different gas tanks. It would be nice to have because then, if you run out of gas in one tank you can switch to the other one and run off a different kind of gas. But that type of gas isnt avliable in some states.
