TULSA, Okla. -- A Tulsa landscaping company has switched from gasoline to propane in an effort to cut fuel costs. Alan Roark with Roark Landscaping had his mowing fleet converted to propane. Twenty ...

Schwan’s Ford E-450s are among the many that run on propane, which the company has used since the 1970s. After more than 40 years of using propane as a motor fuel, the people at The Schwan Food Co.

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 ...