The ethanol methanol gasoline (EM) solutions were first prepared at three different rates in volume bases as 5:5:90, 3.5:3.5:93 and 1.5:1.5:97 for ethanol, methanol and gasoline, respectively. Then, the ethanol gasoline (E) solutions were prepared in the rates of 10:90, 7:93 and 3:97 for ethanol and gasoline, respectively.