Compressed Natural Gas (CNG) is an attractive auto mobile fuel. It substantially reduces the cost of fuel for motorists while protecting the environment and saving country foreign exchange spent on import of liquid fuels. CNG is environmentally clean, lead free and produces 90 percent less carbon monoxide in exhaust emissions, thus reducing the hazards of lead poisoning and cardiac problems. CNG has already been introduced as an automotive fuel in Pakistan and Government is promoting development of CNG industry in the Private sector as well. Considering all relevant aspects in mind, Army has also embarked on an initiative to save energy in transport sector. Also in a quest to save large expenditure of Government exchequer for import of different grades of fuels, evaluation for conversion of petrol vehicle to CNG was undertaken to primarily ascertain military vehicle capability to qualify performance parameters to access battle worthiness when converted to use CNG without compromising agility and mobility of the vehicle since the operating requirements are entirely different for operations as compared to the normal road condition. In the current research work the evaluation proved successful for conversion of gasoline vehicle to CNG for executing station and administrative duties blended with economical and environmental benefits.