| abstract |
An engine oil is disclosed that comprises a lubricating oil, and an overbased alkaline earth salicylate detergent of the structure: (formula 1). Wherein: X is (formula 2). R1 is selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl; R2, R3, R4, R5, and R6 are independently selected from the group consisting of hydrogen, X, and innocuous functional groups; a and b are independently selected integers > 0 and a+b > 8; m is 2; and M is an alkaline earth metal. |