Lubricating engine oil compositions containing detergent compounds

Abstract

The present disclosure generally relates to a lubricating oil composition comprising an oil of lubricating viscosity, and an alkylhydroxybenzoate detergent compound.

What is claimed is: 
     
         1 . A lubricating oil composition comprising:
 (a) a major amount of an oil of lubricating viscosity, and   (b) an alkylhydroxybenzoate compound derived from C 10 -C 40  isomerized normal alpha olefins, wherein the TBN of the alkylhydroxybenzoate detergent is from 10 to 300 mgKOH/gm on an oil-free basis.   
     
     
         2 . The lubricating oil composition of  claim 1 , further comprising a molybdenum compound. 
     
     
         3 . The lubricating oil composition of  claim 3 , wherein the molybdenum compound is a molybdenum succinimide. 
     
     
         4 . The lubricating oil composition of  claim 1 , further comprising a friction modifier. 
     
     
         5 . The lubricating oil composition of  claim 4 , wherein the friction modifier is a fatty acid derivative. 
     
     
         6 . The lubricating oil composition of  claim 5 , where the fatty acid derivative is a fatty acid ester, borated fatty acid ester, or an amide 
     
     
         7 . The lubricating oil composition of  claim 1 , further comprising a detergent selected from phenate, sulfonate, salicylate, salixarate, saligenin, complex detergents and naphthenate detergents. 
     
     
         8 . The lubricating oil composition of  claim 7 , wherein the detergent is an overbased sulfonate. 
     
     
         9 . The lubricating oil composition of  claim 1 , wherein the isomerized normal alpha olefin has an isomerization level (I) of the normal alpha olefin of from about 0.1 to about 0.4. 
     
     
         10 . The lubricating oil composition of  claim 1 , wherein the isomerized normal alpha olefin has from about 14 to about 28 carbon atoms per molecule. 
     
     
         11 . The alkylhydroxybenzoate detergent of  claim 1 , wherein the isomerized normal alpha olefin has from about 18 to about 24 carbon atoms per molecule. 
     
     
         12 . The alkylhydroxybenzoate detergent of  claim 1 , wherein the isomerized normal alpha olefin has from about 20 to about 24 carbon atoms per molecule. 
     
     
         13 . The lubricating oil composition of  claim 1 , wherein the alkylhydroxybenzoate detergent is an alkylated hydroxybenzoate detergent. 
     
     
         14 . The lubricating oil composition of  claim 1 , wherein the alkylhydroxybenzoate detergent is a calcium alkylhydroxybenzoate detergent. 
     
     
         15 . The lubricating oil composition of  claim 1 , further comprising a metal dithiophosphate. 
     
     
         16 . The lubricating oil composition of  claim 15 , wherein the metal dithiophosphate contains a secondary alkyl group. 
     
     
         17 . A method of lubricating an engine comprising lubricating said engine with a lubricating oil composition comprising:
 (a) a major amount of an oil of lubricating viscosity, and   (b) an alkylhydroxybenzoate compound derived from C 10 -C 40  isomerized normal alfa olefins, wherein the TBN of the alkylhydroxybenzoate compound is 10-300 mgKOH/gm on an oil-free basis.