Abstract: Provided is a compound which can increase all of the shudder prevention lifetime, transmission characteristic and transmission torque capacity to satisfactory levels when contained in a lubricating oil. Provided are a succinimide compound represented by the following general formula (1), and a friction modifier and a lubricating oil composition containing the succinimide compound. (In the formula (1), R represents a hydrocarbyl group having 8 to 30 carbon atoms; and n represents an integer of 1 to 7.

Abstract: The invention provides a dispersant or a solubilizer containing a particular calixarene compound, wherein, of the phenolic hydroxyl groups constituting calixarene, at least one is not substituted, and at least one is substituted by a group having a total carbon number of not less than 10 and comprising one or more alkyleneoxy groups and/or a hydrocarbon group. A carbon-based material (fullerene, carbon nano tube and the like), an organic pigment (phthalocyanine blue and the like), and the like can be dispersed or solubilized in an organic matrix (organic solvent and the like) with the dispersant or solubilizer.