Lubricating oil composition
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United States of America Patent
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Jun 14, 2011
Grant Date -
Jul 10, 2008
app pub date -
Dec 13, 2007
filing date -
Jan 5, 2007
priority date (Note) -
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Abstract
A lubricating oil composition favorably employable for trunk piston diesel engines contains an overbased sulfurized alkylphenol calcium salt, at least two (preferably three) overbased alkylsalicylic acid calcium salts having different base ratios and hydrocarbyl groups of different carbon atom numbers, a borated ashless dispersant, and a zinc dihydrocarbyldithiophosphate.
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