Boundary friction reducing lubricating composition

Abstract

There is disclosed a lubricating composition having a base oil, a friction modifier, and a dispersant, wherein the lubricating composition has less than about 325 ppm of boron. Methods of making and using the disclosed lubricating composition are also disclosed.

1 . A lubricating composition comprising a base oil, a friction modifier, and a dispersant, wherein the lubricating composition comprises less than about 325 ppm of boron. 
     
     
         2 . The composition of  claim 1 , wherein the dispersant comprises a basic nitrogen. 
     
     
         3 . The composition of  claim 1 , wherein the dispersant is a non-boron-containing dispersant. 
     
     
         4 . The composition of  claim 1 , wherein the dispersant is a polyisobutylene-based dispersant. 
     
     
         5 . The composition of  claim 1 , wherein the friction modifier is at least one of a non-nitrogen-containing compound, a nitrogen-containing compound, and an ash-containing compound. 
     
     
         6 . The composition of  claim 5 , wherein the nitrogen-containing compound is a long chain alkylene amine. 
     
     
         7 . The composition of  claim 6 , wherein the long chain alkylene amine is chosen from N-oleyl-trimethylene diamine, N-tallow-trimethylene diamine, coco-trimethylene diamine, and mixtures thereof. 
     
     
         8 . The composition of  claim 5 , wherein the nitrogen-containing compound is diethanolamine. 
     
     
         9 . The composition of  claim 5 , wherein the ash-containing compound is chosen from molybdenum-containing compounds, titanium-containing compounds, and tungsten-containing compounds. 
     
     
         10 . The composition of  claim 9 , wherein the molybdenum-containing compound comprises sulfur. 
     
     
         11 . The composition of claim  91  wherein the molybdenum-containing compound is chosen from molybdenum carboxylates, molybdenum amides, molybdenum thiophosphates, molybdenum thiocarbamates, and mixtures thereof. 
     
     
         12 . The composition of  claim 5 , wherein the non-nitrogen-containing compound is a polyolester. 
     
     
         13 . The composition of  claim 12 , wherein the polyolester is chosen from glycerol monooleate and glycerol monolaurate. 
     
     
         14 . A method of formulating a lubricating composition having improved fuel efficiency comprising providing a base oil, a dispersant, and a friction modifier, wherein the composition comprises less than about 325 ppm of boron. 
     
     
         15 . A method of reducing boundary friction on a surface comprising providing to the surface a lubricating composition comprising a base oil, a dispersant, and a friction modifier, wherein the composition comprises less than about 325 ppm of boron. 
     
     
         16 . The method of  claim 15 , wherein the friction modifier is at least one of a on-nitrogen-containing compound, a nitrogen-containing compound, and an ash-containing compound. 
     
     
         17 . The method of  claim 15 , wherein the dispersant comprises a basic nitrogen. 
     
     
         18 . The method of  claim 17 , wherein the dispersant is a polyisobutylene-based dispersant. 
     
     
         19 . A method of lubricating an engine comprising the steps of providing to the engine the lubricating composition of  claim 1 . 
     
     
         20 . An automotive engine lubricated with the lubricating composition of  claim 1 .