| abstract |
A composition comprising of an oil of lubricating viscosity ;a shearnstable viscosity modifier; at least 0.1 percent by weight of an overbased metalnsalt; at least 0.1 percent by weight of at least one phosphorus compound; andn0.1 to 0.25 percent by weight of a combination of at least two friction modifiersnprovides an improved fluid for continuously variable transmissions. At leastnone of the friction modifiers is selected from the group consisting of zinc saltsnof fatty acids having at least 10 carbon atoms, hydrocarbyl imidazolines containingnat least 12 carbon atoms in the hydrocarbyl group, and borated epoxides.nThe total amount of the friction modifiers is limited to those amounts whichnprovide a metal-to-metal coefficient of friction of at least about 0.120 as measurednat 110°C by ASTM-G-77. |