A method for enriching air with hydrogen for subsequent use by internal combustion engines is discussed. The method begins with supplying a modified form of water. Subsequently, the method continues with electrolyzing the water to produce hydrogen gas. Next, the method involves mixing the gas with air to produce a hydrogen-air mixture, and injecting the mixture into the air intake of a combustion engine. Also discussed is a system for enriching internal combustion engine air intake with hydrogen gas. The system uses modified water, an electrolysis unit for producing hydrogen gas from the modified water. The system mixes the gas with ambient air to create a mixture, and a venturi-based injector introduces the mixture into the air intake system of the engine.