Patent ID: 6712866
Filing Date: 2004-03-30
Classification: C10L

Abstract:
A spark ignition motor fuel composition consisting essentially of:a hydrocarbon component consisting essentially of one or more hydrocarbons selected from the group consisting of four to eight carbon atom straight-chained or branched alkanes, wherein said hydrocarbon component has a minimum anti-knock index of 65 as measured by American Society for Testing and Materials (ASTM) D-2699 and D-2700 and a maximum dry vapor pressure equivalent (DVPE) of 15 psi (one atmosphere) as measured by ASTM D-5191; a fuel grade alcohol; and a co-solvent miscible in both said hydrocarbon component and said fuel grade alcohol; wherein said co-solvent is selected from a group consisting of 2-ehyletrahydrofuran (ETHF)and 2-methyletrahydrofuran (MTHF) wherein said hydrocarbon component, said fuel grade alcohol and said co-solvent are present in amounts effective to provide a fuel with a minimum and knock index of 87 as measured by ASTM D-2699 and ASTM D-2700, and wherein said fuel composition is essentially free of olefins, aromatics, and sulfur.