| abstract |
(57) [Summary]nDisclosed is a lubricating composition comprising a triglyceride oil lubricant and an oil-soluble copper compound antioxidant. Oil-soluble copper compounds are particularly effective antioxidants for triglycerides. The lubricating composition can include a soluble zinc compound that reduces wear and / or a soluble antimony compound that can reduce wear and function as an auxiliary antioxidant, reducing the amount of soluble copper required. . Preferred zinc and antimony compounds are zinc dithiophosphate antiwear / antioxidants, and antimony dialkyldithiocarbamate antioxidants. |