Lubricating oil composition for automatic transmission
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United States of America Patent
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-
Jul 15, 2003
Grant Date -
Dec 12, 2002
app pub date -
Jun 5, 2001
filing date -
Jun 5, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To provide a lubricating oil composition for automatic transmission which ensures both a high torque capacity of a wet clutch and a good .mu.(coefficient of friction)-V (sliding velocity) characteristic in an automatic transmission along with excellent storage stability in a high humidity environment. A lubricating oil composition for automatic transmission is provided, which comprises a lubricating base oil made of a mineral oil and/or a synthetic oil formulated with a friction modifier, a metal detergent and an ashless dispersant, characterized in that said ashless dispersant consists of an succinimide having boron at a rate of three or less atoms in one molecule of the ashless dispersant.
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