A comprehensive experimental study on the effect of electromagnetic field on the ionization and combustion of fuel in an internal combustion engine is presented. The major aim is for the user economy and environmental friendly especially as it may affect climate change.The experimental set up consist a HGA 200 computerized exhaust gas analyzer, one cylinder 4 stroke engine, a copper wire wound round a hollow cylindrical rod which is connected to a DC 12 V battery. The exhaust product was channeled to the HGA 200 for proper analysis of the exhaust constituent .The set up was allowed to run for one hour without the electromagnetic device to serve as a base line for comparison. Series of test runs were conducted using the device along the fuel line of the engine. Results obtained during the test, gave a 50% reduction in the hydrocarbon constituent of the exhaust product in PPM and 35% reduction in the carbon monoxide. These results clearly indicate that the introduction of an electromagnetic field within the fuel line of an I.C engine enhances the combustion process thereby economizing fuel consumption and reducing gas emission making it environmental friendly engine. They study suggest that the materials for the inlet manifold and the top cylinder of the engine be made from a magnetic material. This will create a permanent magnet around the combustion chamber for proper mixing and the burning of the fuel.