| abstract |
A lubricating oil comprises a major amount of a base oil and a minor amount of an additive package, wherein the additive package comprises one or more friction modifiers including a reaction product of a hydroxy acid represented by HOCH 2 CO 2 H and an amine represented by the formula II: n n n n n n n n n n wherein R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms; X is oxygen or —NH; and m is an integer from about 1 to about 4. The friction modifiers may include one or more compounds of the Formula I: n n n n n n n n n n wherein X is selected from oxygen, —NR 1 , and a glycolic amide moiety; and R and each R1 are independently selected from linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms and one but not both of R and R1 can be hydrogen; and m is an integer from about 1 to about 4. Methods of improving thin film and/or boundary layer friction are also provided. |