Having driven trucks converted to run on CNG, we're fans of development of the home-grown alternative fuel, delivering competitive performance with a fuel cost almost half as much as diesel or gasoline. The one area where the technology still needed some development was the up-front cost, which approached $11,000 in some cases for a bi-fuel or dedicated conversion.
Thanks in part to the use of a new composite CNG tank from 3M, the cost of the CNG conversion from Venchurs Vehicle Systems has dropped by a staggering $2550, from $10,900 to $8350. This puts the cost of a CNG bi-fuel conversion right around the same ballpark as a factory diesel powertrain option, which runs $8095 in the Ford, $8395 in the Silverado and Sierra HD, and $8295 in the Ram HD with the automatic transmission.
The Venchurs bi-fuel package on the Ford F-250 allows for a combined range of 675 miles, and switch-on-the-fly capability between gasoline and CNG. As a Ford Qualified Vehicle Modifier (QVM) Venchurs conversions maintain the factory warranty, and can be financed through Ford Credit. In addition to the CNG conversion, Venchurs models can also be equipped with accessories such as special wheels, running boards and grille guards, according to the customer's preferences.
Source: Venchurs Vehicle Systems