Ford announced the availability of a specially prepped 2014 F-150 for CNG or LPG in July. This week, he first of those trucks has come off the line in Ford's Kansas City, Missouri, plant. Ford is currently the only full-size truck manufacturer offering a 1/2-ton gaseous fuel upfit package from the factory.

The gaseous fuel option is currently available only with the base 3.7-liter V-6. The package includes hardened valves, valve seats, pistons, and rings, allowing it to run on natural gas, propane, or gasoline. When configured as a bi-fuel vehicle (gaseous fuel and gasoline), the truck has a total range of more than 750 miles, depending on tank size.

Customers who want to buy a CNG/LPG prep F-150 specify the upfitter of their choice to install the gaseous fuel system. Upfit costs run $6000-$9500 depending on the system. The engine prep package, including the hardened valves, costs only $315.

In addition, the fuel savings with natural gas being significantly cheaper on a GGE (gasonline gallon equivalent) basis, several states are offering incentives for the purchase of alternative-fuel vehicles. Ford offers a variety of vehicles with a gaseous prep option, including the Transit Connect, Transit full-size van, E-Series van, F-650, F-Series Super Duty and chassis-cab, F53 and F59 stripped chassis and now F-150.