Antioxidant combination for oxidation and deposit control in lubricants containing molybdenum and alkylated phenothiazine
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United States of America Patent
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app pub date -
Sep 13, 2004
filing date -
May 30, 2002
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Abstract
The invention relates to a lubricating oil composition having improved antioxidant properties, and which contains a molybdenum compound and an alkylated phenothiazine. Further, it may also include a secondary diarylamine, preferably an alkylated diphenylamine. This combination of additives provides improved oxidation control and friction modifier performance to the lubricating oil. The composition is particularly suited for use as a crankcase lubricant, or a transmission lubricant, including low levels and zero levels of phosphorus.
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