Abstract: A gasoline refractionator for internal combustion engines has a first heat exchanger which receives gasoline from a fuel source and cools the gasoline sufficiently to cause the gasoline to separate into its lighter and heavier ends or components. The separated components are then heated in a second heat exchanger to a temperature at which the components will tend to remain separated even when in physical contact with one another. By imparting a swirl to the heated components, the heavier components will tend to surround the lighter components and provide maximum surface contact between the components during ignition in a cylinder of an internal combustion engine.