FUEL ECONOMY LUBRICATING OIL COMPOSITION FOR LUBRICATING DIESEL ENGINES
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United States of America Patent
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Issued Date -
Jan 1, 2009
app pub date -
Jun 27, 2008
filing date -
Jun 28, 2007
priority date (Note) -
Abandoned
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Abstract
A lubricating oil composition for internal combustion engines comprising a base oil having and lubricating viscosity and additives composed of a) a salt of an alkali metal or alkaline earth metal and an alkylsalicylate and/or an alkylcarboxylate, b) a nitrogen atom-containing ashless dispersant and/or a nitrogen atom-containing dispersive viscosity index improver, c) a neutral salt of a fatty acid and a fatty amine, and d) oxidation inhibitor, is effective for lubricating diesel engines using a low sulfur-content fuel, even though it has a low sulfated ash content, a low sulfur content and a low phosphorus content.
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