Abstract: Scrap rubber automobile tires, oil soluble plastics, as well as waste motor oil are disposed of by the process of the subject invention without polluting the nation's environment. Further, useful product synthesis gas, reducing gas, or fuel gas is produced. The rubber from the rubber tires and/or oil soluble plastics are dissolved in the waste motor oil to produce a homogeneous pumpable tire-oil which is separated from undissolved tire belt material containing undissolved rubber and/or oily material, solid residue, and off-gas comprising light hydrocarbons having a maximum atmospheric boiling point of 850.degree. F., and H.sub.2 S. The undissolved tire belt material is coked to produce off-gas, inorganic materials and carbon black. Off-gas form the liquefaction and coking reactors is cooled to produce organic condensate. The tire oil, carbon black, and condensate are mixed together and introduce into a partial oxidation gas generator for the production of synthesis gas, reducing gas, or fuel gas.