FARGO, N.D. -- Bill Ongstad says converting his new 2013 Ford 350 to a propane bi-fuel system might save him 40 percent in fuel costs. "I figure to have it paid for by Christmas," says Ongstad, who ...

If you want the best of gaseous fuels without the drawbacks of compressed natural gas, you might consider converting your vehicle to propane--that is, if you have an older vehicle. Liquid petroleum ...