Gasoline fuel extender formulation

A homogeneous combustion engine fuel extender formulation for blending with and use in gasoline as a partial substitute therefor in proportions of not greater than about 40 parts by volume with respect thereto that is characterized by the stability of its alcohol content in the presence of water and its miscibility with and a substantial retention of engine operating characteristics as present with commercial gasoline;

• said formulation consisting essentially of a low octane aliphatic naphtha consisting of C7 heptane hydrocarbons, cycloparaffins, and a small amount of any aromatics and olefins wherein the heptane hydrocarbons and the cycloparaffins are within an approximate ratio of about 50% each in the naphtha, and wherein the naphtha is in an amount of not less than about 6 to not more than about 10 parts by volume in the formulation;
• said formulation also consisting essentially of about 1 part by volume of substantially dehydrated ethanol, and about 1/4 to 11/4 parts by volume of a higher alcohol of the class of anhydrous isopropyl;
• wherein the specific gravity of the ingredients of the formulation is not substantially greater than about .+-.2% of the gasoline to which it is to be added, and wherein all of the ingredients of the formulation as premixed in the defined proportions as an extender for commerical gasoline have a substantially full phase stability therein.