Effects of melamine-cyanurate (MCA) in liquids and in greasel compounds on load-carrying capacity, wear rate and coefficient of friction were examined. It was found that MCA was effective in improving the lubricative properties of some kinds of carrier. It especially improved the load-carrying capacity when added in water and was effective in reducing the wear of brass specimen. The effects of MCA largely depended on the kinds of carrier material and bearing specimen material.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in Dayton, Ohio, October 16–18, 1979