CNG (Compressed Natural Gas) is 82 CENTS per gallon where I live. I would like to be able to special-order ANY Ford Vehicle with a CNG prep package. BAF (Ford's authorized CNG upfitter) says it will not go through the EPA certification process to certify a system if Ford does not first offer the engine with the Prep Package. All of the Pickups & E-Series Vans offer it -- Offer it on the Expedition as well and trickle down to everything else. Benefits to CNG: Cleaner Burning - less emissions than a Prius and less Engine wear 130 Octane! 92% of Natural Gas is domestically produced. NO reliance on foreign oil!! Cheaper Cost-per-Mile than ANY gasoline car on the market. (take cost of Gas divided by mpg to get cost per mile. Now, do the calculation with CNG at $0.82/gallon). Greener than a Prius -- and NO Batteries!