Abstract: The present invention provides a fuel additive which can inhibit the emission of harmful gases from a fuel such as gasoline or gas oil without adversely influencing the consumption of the fuel and with which the fuel can be stably stored; and a fuel composition containing the fuel additive added thereto. Also provided are: a method of activating a lower alcohol which comprises bringing the lower alcohol into contact with a substance activated by heating and pressurizing in the presence of wood vinegar and/or bamboo vinegar or with a material formed by processing the substance; a lower alcohol activated by the method; and lower alcohols comprising the activated lower alcohol. The fuel additive comprises the one or more lower alcohols. The fuel composition comprises a fuel and the fuel additive.

Abstract: The present invention provides a method of producing a low pollution fuel comprising the steps of passing in an electromagnetic field a synthetic fuel comprising methyl alcohol or ethyl alcohol and butyl alcohol, toluene, and heavy gasoline, subjecting the synthetic fuel to supersonic wave vibration, and having the synthetic fuel pass in contact with a predetermined inorganic substance. There is also provided an apparatus for producing a low pollution fuel which comprises a synthetic fuel introducing path, magnetic field generating means for generating a magnetic field, supersonic generating means, and inorganic substance, a synthetic fuel contact path for passing a synthetic fuel in contact with the inorganic substance, a synthetic fuel discharge path, and means for sending out the synthetic fuel.