In this study, the effect of ethanolgasoline blend with additives on a multi-cylinder spark ignition engine was investigated. The performance and emission tests were conducted in a multi-cylinder petrol engine. The test fuels were prepared using 99.9% pure ethanol and gasoline with additives blend, in the ratio of E50 + 5 additives, E60 + 10 additives, and the rest gasoline. Oxygen containing additives is usually used to improve gasoline's performance, reduce the exhaust emissions, and to increase fuel consumption as a result of the heating value of the blended fuels being lower than that of the gasoline. Similarly, octane improver additives and anti-knock additives are used. The aim of this investigation is to reformulate the fuel in order to enhance the fuel performance and reduce emissions from the engine. The fuel additive for internal combustion engines contains a mixture of toluene, methanol, isopropyl alcohol, acetone, and xylene. The fuel additives are added to the fuel so as to enhance the operation of the engine, and reduce the quantum of pollutants released by the engine. The fuel is prepared by mixing ethanolgasoline with fuel additives blend. The fuel additives were added by weight: toluene (50%), methanol (15%), isopropyl alcohol (15%), acetone (10%), and xylene (10%). The experimental results revealed the increase in brake thermal efficiency on the use of blends when compared to that of the sole fuel. In this investigation, the emission tests were conducted with the help of AVL Di Gas analyzer, in which CO, CO2, HC, and NOx are appreciably reduced and O-2 is increased for all the blends when compared to gasoline as the sole fuel.