MARINE ENGINE LUBRICATION
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United States of America Patent
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Issued Date -
Jan 15, 2015
app pub date -
Jul 9, 2014
filing date -
Jul 9, 2013
priority date (Note) -
Abandoned
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Abstract
A detergent system that includes (i) an overbased C20-28 alkyl-substituted hydroxybenzoate Ca salt of TBN less than 250 and (ii) an overbased C14-18 alkyl-substituted hydroxybenzoate Ca salt of TBN less than 250, the wt % Ca ratio of (ii) to (i) being more than one, is used in a trunk piston marine lubricant to improve its asphaltene dispersancy when lubricating a medium-speed compression-ignited marine engine fuelled by a heavy fuel oil.
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