LUBRICATING OIL COMPOSITION
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United States of America Patent
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Issued Date -
Dec 16, 2010
app pub date -
Jun 15, 2010
filing date -
Jun 16, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
There is provided a lubricating oil composition that has good friction performance and friction performance durability, and which is unlikely to cause degradation of oil seals made from fluororubbers, and which is particularly useful as an automatic transmission fluid. This lubricating oil composition is produced by adding a phosphorus/nitrogen-containing ashless dispersant of 0.2 to 8 wt % with a nitrogen/phosphorus ratio of 1.5 to 2.8, a friction modifier of 0.01 to 5 wt %, a metal-containing detergent of 0.005 to 2 wt %, and an antioxidant of 0.1 to 5 wt % as additives to a base oil with a lubricating viscosity.
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