In the 5th world Petroleum Congress-Section IV, the problems of utilization of petroleum products were discussed, and 29 reports published are classified to on fuels (gasolin, light oil, heavy oil etc.), lubricants and greases, engine, asphalts and crude oil. In this paper, all reports are explained in outline except on engine and crude oil. For instance, on gasoline, the comparison of performance and octane number required of american and european cars, the calculation of road octane number, a new antiknock agent, an abnormal combustion phenomena and so on are described. On lubricants, various kind of additive, boundary lubrication and so on are described.
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