Abstract: An improved composition for fueling an internal combustion engine equipped with at least one carburetor which comprises a major amount of hydrocarbons boiling in the gasoline boiling range, a minor amount of at least one detergent, and a minor amount of mineral oil of lubricating viscosity comprising at least about 50% by weight of aromatic hydrocarbons having an average molecular weight in the range from about 300 to about 700 the detergent and oil both being present in the composition in amounts sufficient to inhibit formation of deposits on the carburetor.An improved method for fueling such an engine using the composition described above is also disclosed.

Abstract: A process for disproportionating a paraffinic hydrocarbon containing 2 to 6 carbon atoms to produce paraffinic hydrocarbons containing one more and one less carbon fragment per molecule is disclosed. In the process the paraffinic hydrocarbon is contacted at about 400.degree. to 1000.degree.F. with an acidic, crystalline aluminosilicate catalyst having a pore size of about 8 to 15 A, silica to alumina mole ratio greater than 2 to 1 and at least about 0.4 equivalent per gram atom of aluminum of hydrogen or metal ion.