LUBRICATING OIL COMPOSITION FOR INTERNAL-COMBUSTION ENGINE, AND METHOD FOR REDUCING FRICTION IN GASOLINE ENGINE
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Mar 9, 2016
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Mar 23, 2015
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Provided is a lubricating oil composition for internal combustion engines capable of exhibit a sufficient friction-reducing effect from a low-temperature range assuming engine starting to a practical temperature range of 80° C. or higher. The lubricating oil composition for internal combustion engines contains a surfactant having an alkylene oxide as the constituent unit and having an HLB value of 7 or more and less than 15, and a lubricant base oil.
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