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A multi-layer catalyst comprising of a core of oxides of transition metals, an intermediate layer of an alumina- based silicate covering the core, and an outer layer of a noble metal alloy covering the intermediate layer was developed and was evaluated as to the reforming performance and its effects on fuel economy. The test results showed that the catalyst, with help of water contained in gasoline, can crack higher molecular hydrocarbons especially such a less combustible substance like aromatics to a lower molecular weight components, resulting in better combustion efficiency.