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Liquefied Petroleum Gas (LPG) and Compressed Natural Gas (CNG) have long been recognized as ideal clean and potentially available fuels for motor vehicles. However, some disadvantages of the two gaseous fuels such as lower energy density (kW/l) compared to gasoline, a loss of power in unmodified converted engines relative to gasoline and the current shortage of refueling stations hamper their widespread use. Additionally, engines with throttle-body gaseous fuel fumigation need longer cranking time and exhibit relatively slow response during transient engine operation. To alleviate the above shortcomings, a low cost dual-fuel system was developed. The prototype system uses a mixture of gaseous fuel (Liquefied Petroleum Gas) and gasoline to enhance fuel economy, drivability, and lower emissions. The two fuels can be mixed at any percentage depending on the customer's need.