LUBRICANT OIL COMPOSITION FOR SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE, METHOD FOR PRODUCING LUBRICANT OIL COMPOSITION, SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE USING LUBRICANT OIL COMPOSITION, AND METHOD FOR LUBRICATING INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Mar 24, 2016
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Mar 24, 2015
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Provided are a lubricating oil composition for internal combustion engine capable of preventing a deterioration of the combustion state of a spark-ignition internal combustion engine, specifically, a lubricating oil composition to be used for a spark-ignition internal combustion engine in which a total tension per piston of tensions applied to the piston ring is 100 N or less, the lubricating oil composition being a lubricating oil composition including a base oil, (A) a calcium-based detergent, at least one selected from (B1) a sodium-based additive and (B2) a magnesium-based additive, and (C) an ash-free sulfur-based additive in predetermined contents; a method for producing the lubricating oil composition; a spark-ignition internal combustion engine using the lubricating oil composition; and a method for lubricating the internal combustion engine.
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