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The demand for compression ignition engines is continuously growing due to their good fuel efficiency. But they cause lot of concern with regard to exhaust emissions. This concern sought to examine ways by which the composition of the fuel used by CI engines could be changed to reduce emissions. The addition of oxygen containing compounds to diesel fuel has been proposed as a method to complete the oxidation of carbonaceous particulate matter and associated hydrocarbons. In addition many oxygenate have high cetane number and their association with diesel results in high cetane number and hence lower exhaust emissions. Due to this advantages, there is growing interest in the introduction of oxygenates into diesel fuel. The performance and emission characteristics of two kinds of oxygenates 2-Ethoxy Ethyl Acetate, 2-Butoxy Ethanol with three different blends were investigated.