TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Components: The vehicle also includes a reformed gaseous fuel-supplying device for supplying a portion of reformed gaseous fuel to gas burning-type heater of the reformer. In other design, the vehicle is provided with an internal combustion engine and a fuel cell. The internal combustion engine comprises a reformer for reforming a portion of liquid fuel to produce a reformed fuel rich with aromatic hydrocarbon and having a high octane value and to produce hydrogen, a hydrogen separator for separating hydrogen from the reformed fuel, a reformed fuel-supplying device for supplying a portion of reformed fuel to the internal combustion engine, and a separated hydrogen-supplying device for supplying the separated hydrogen as a fuel to the fuel cell. A hydrogen storage vessel stores hydrogen from the hydrogen separator.The fuel cell is used as power source for an electric system mounted in the vehicle. The electric system includes a vehicle travel motor. In other design, the vehicle comprises a premixing and compression/ignition-type internal combustion engine in which a mixture of oxygen-containing gas and fuel is compressed and self-ignited; a liquid fuel-supplying device that supplies a liquid fuel, which is not reformed, to the internal combustion engine; a reformer that reforms the liquid fuel to produce a liquid fuel rich with aromatic hydrocarbon and having a high octane value; a high octane liquid fuel-supplying device that supplies the liquid fuel having the high octane value as a fuel to the internal combustion engine; a regulating device that regulates an amount of unreformed liquid fuel and an amount of the reformed liquid fuel to be supplied to the internal combustion engine, respectively. The regulating device increases a proportion of the liquid fuel having the high octane value supplied to the internal combustion engine when the engine is operated under high load, and decreases the proportion of liquid fuel having the high octane value supplied to the internal combustion engine when the engine is operated under low load.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Catalyst: Crystalline aluminosilicate is used as a catalyst in the dehydrogenating cyclization reaction. The crystalline aluminosilicate has a MFI structure. It comprises gallium, zinc, and/or platinum.