March 20, 2013 – Roush CleanTech and Green Alternative Systems (GAS) revealed the new Ford F-550 chassis cab powered by propane autogas at the Work Truck Show 2013. With over 65 usable gallons, this vehicle promises the longest driving range of any dedicated alternative fuel counterpart on the market. The fuel tank sits between the frame rails and behind the aft axle. Equipped with a 6.8-liter, V10 engine, the propane autogas alternative fuel system is available beginning with 2013 model year vehicles or newer. GAS—a certified Ford qualified vehicle modifier (QVM)—designs mounting hardware, handles packaging strategy and integrates Roush CleanTech propane autogas fuel system technology into the F-550 chassis cab. The vehicles maintain the factory Ford warranty and the same horsepower, torque and towing capacity as their gasoline counterparts.