[thackney]

The article doesn't say if the conversion is to a CNG only vehicle, or to a dual-fuel vehicle.

From the article:

Last year, Ford announced that its 2014 F-150 trucks would come in two options beyond the typical gasoline model: one that runs on natural gas and another that can run on natural gas or gasoline.

Either or both fuels.

[tahoeblue]

Missed that - thanks!