Petroleum fuels have its disadvantages. Use of Alternative fuels is need of future.  But alternative fuels also have some drawbacks. To reduce the drawback of petroleum fuels need to do some improvements like use of hydrogen gasoline blend to run IC engine, which don’t have much drawbacks. Use of additive fuel in IC engine will reduce the emission also increase the efficiency of IC engine. By electrolysis of water we get Brown’s gas (HHO gas), which can be used as additive fuel for IC engine. HHO blended fuel is introduced to combustion chamber of IC engine. While burning of charge HHO gas reduces the specific fuel consumption. By using HHO gas as additive will reduces the combustion temperature. Extra oxygen molecule (H-H-O) ensures clean burning of fuel which results low emission. This is low cost system, which can be used to any petrol engine.