Lubricating Oil Composition
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United States of America Patent
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Issued Date -
May 17, 2012
app pub date -
Sep 7, 2011
filing date -
Sep 8, 2010
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Abandoned
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Abstract
A lubricating oil composition having a low sulfated ash content, a low P content, a low S content and a low Cl content and being favorably employable for lubricating a diesel engine operated using a hydrocarbon fuel oil having a low S content, comprises the following components a) to d) dissolved or dispersed in a base oil having a low S content: a) an ashless dispersant such as alkenyl- or alkylsuccinimide or its derivative, b) a calcium alkylsalicylate detergent having a low S content and containing an organic acid calcium salt, which is a mixture of an unsulfurized calcium alkylsalicylate detergent having a C14-C18 alkyl group and an unsulfurized calcium alkylsalicylate detergent having a C20-C28 alkyl group, c) a zinc phosphate anti-wear agent, and d) an oxidation inhibitor.
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