Bifuel Vehicles Give Option of Gasoline, Propane, Compressed Gas

Beginning of article

As alternatives to gasoline, fuels such as propane and compressed natural gas (CNG) have suffered from two critical drawbacks: the first being that it's often difficult to find a refueling facility when the tank runs low.

That problem has made CNG- and propane-powered cars and trucks impractical for all but fleet and commercial users, who drive predictable routes and have access to centralized refueling stations.

But that obstacle, at least, has been surmounted by so-called "bifuel" vehicles - which can switch between propane or CNG and gasoline at the flip of a dashboard-mounted control knob.

Ford Motor Co. recently announced the forthcoming …