Abstract: A system for gasifying a mixture of fuel, air and recycling exhaust gases for induction into an internal combustion engine, comprising means interconnected between extant fuel pump and engine carburetor to preheat the mixture by bleeding heat from a heat generator to the flow line between pump and carburetor for preheating said flow line and of utilizing the heating media in the carburetion process and optionally secondarily heating said carbureted mixture in the generator sequentially of introduction of the preheated fuel to the carburetor.