The potential possibility of oxygenated fuel for di-ether group oxygenated additives such as Methyl tertiary butyl ether(MTBE) and diethylene glycol dimethyl ether(DGM) were investigated for the sake of exhausted smoke reduction from diesel engine. They include oxygen content approximately from 18% to 36%, it is a kind of oxygenated fuel that the smoke emission of them is reduced remarkably compared with commercial diesel fuel. In the experiment by gas chromatography, unburned hydrocarbons of oxygenated fuel were reduced than those of commercial diesel fuel.