Low phosphorous engine oil compositions and additive compositions
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United States of America Patent
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May 13, 1997
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N/A
app pub date -
Dec 3, 1993
filing date -
Aug 9, 1991
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Abstract
An engine oil composition which comprises a metal-containing detergent, zinc dithiophosphate, and a boron-containing ashless dispersant dissolved or dispersed in a base oil; characterized by further containing an antiwear agent having an aliphatic amide compound and either a dithiocarbamate compound or an ester derived from a fatty acid and boric acid.
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