Lubricating oil composition with renewable base oil

Abstract

A lubricant composition and method for improving engine performance using a renewable base oil composition comprising hydrocarbon mixtures and a lubricant additive having a sulfur content of up to about 0.4 wt. % and a sulphated ash content of up to about 0.5 wt. % is described herein.

What is claimed is: 
     
         1 . A lubricating composition that comprises
 a. a mixture of base oil having at least 25 wt. % renewable base oil comprising a hydrocarbon mixture in which (a) the percentage of molecules with even carbon number is ≥80% according to FIMS (b) the BP/BI≥−0.6037 (Internal alkyl branching per molecule)+2.0 (c) on average there are 0.3 to 1.5 5+ methyl per molecule; and   b. an additive composition having a sulfur content of up to about 0.4 wt. % and a sulfated ash content of up to about 0.5 wt. %, as determined by ASTM D874 and comprising of (a,) at least one oil-soluble of dispersed oil stable boron containing compound having from 400 ppm to no more than 2000 ppm of boron, based upon the total mass of composition (b) at least one oil-soluble or dispersed oil stable molybdenum containing compound having from about 700 ppm of molybdenum to no more than 1500 ppm of molybdenum, based upon the total mass of composition; wherein the lubricating oil composition has a ratio of sulfur to molybdenum of about 0.5:1 to less than or equal to about 4:1, and further wherein the lubricating oil composition is substantially free of zinc dialkyl dithiphosphate. wherein the total additive concentration ranges from about 20% to 30% and base oils mixtures from about 70% to 80%.   
     
     
         2 . The lubricating composition of  claim 1 , wherein lubricating high-temperature high shear viscosity is less than or equal to 3.2 cP, based on ASTM D5481. 
     
     
         3 . The lubricating composition of  claim 1 , wherein lubricating kinematic viscosity at 100° C. is less than or equal to 12.5 cSt, based on ASTM D445. 
     
     
         4 . The lubricating composition of  claim 1 , wherein lubricating low temperature cold cranking viscosity at −25° C. is less than or equal to 7000 mPa·s, based on ASTM D5293. 
     
     
         5 . The lubricating composition of  claim 1 , wherein low temperature pumping viscosity is less than or equal to 60,000 mPa·S at 30° C. without any yield stress, based on ASTM D4686. 
     
     
         6 . A method of improving fuel economy retention, extending oil drain interval and reducing oil consumption of an internal combustion engine with lubricants that comprises
 a. a mixture of base oil having at least 25 wt. % renewable base oil comprising a hydrocarbon mixture in which (a) the percentage of molecules with even carbon number is ≥80% according to FIMS (b) the BP/BI≥−0.6037 (Internal alkyl branching per molecule)+2.0 (c) on average there are 0.3 to 1.5 5+ methyl per molecule; and an   b. additive composition having a sulfur content of up to about 0.4 wt. % and sulfated ash content of up to about 0.5 wt. %, as determined by ASTM D874 and comprising of (a,) at least one oil-soluble of dispersed oil stable boron containing compound having from 400 ppm to no more than 2000 ppm of boron, based upon the total mass of composition (b) at least one oil-soluble or dispersed oil stable molybdenum containing compound having from about 700 ppm of molybdenum to no more than 1500 ppm of molybdenum, based upon the total mass of composition; wherein the lubricating oil composition has a ratio of sulfur to molybdenum of about 0.5:1 to less than or equal to about 4:1, and further wherein the lubricating oil composition is substantially free of zinc dialkyl dithiphosphate.   
     
     
         7 . The method of  claim 6 , wherein fuel economy retention is improved by more than 0.2%. 
     
     
         8 . The method of  claim 7 , wherein the internal combustion engine is a heavy duty diesel engine. 
     
     
         9 . The method of  claim 6 , wherein the oil drain interval is extended by more than 30%. 
     
     
         10 . The method of  claim 9 , wherein the internal combustion engine is a heavy-duty diesel engine. 
     
     
         11 . The method of  claim 6 , wherein the oil usage is reduced by more than 50%. 
     
     
         12 . The method of  claim 11 , wherein the internal combustion engine is a heavy duty diesel engine. 
     
     
         13 . A method for reducing the loss of fuel economy in internal combustion engines to no more than 6% by supplying the composition of  claim 1 . 
     
     
         14 . The method of  claim 13 , wherein the internal combustion engine is a medium duty diesel engine. 
     
     
         15 . The method for reducing loss of peak torque in internal combustion engines to no more than 70 Nm by supplying the composition of  claim 1 . 
     
     
         16 . The method of  claim 15 , wherein the internal combustion engine is a medium duty diesel engine. 
     
     
         17 . A method for reducing loss of peak power in internal combustion engines to no more than 20 KW by supplying the composition of  claim 1 . 
     
     
         18 . The method of  claim 17 , wherein the internal combustion engine is a medium duty diesel engine. 
     
     
         19 . A method for reducing rise in the exhaust manifold temperature in internal combustion engines to no more than 50° C. by supplying the composition of  claim 1 . 
     
     
         20 . The method of  claim 19 , wherein the internal combustion engine is a medium duty diesel engine. 
     
     
         21 . A method for reducing oil usage in internal combustion engines to no more than 7500 grams by supplying the composition of  claim 1 . 
     
     
         22 . The method of  claim 21 , wherein the internal combustion engine is a medium duty diesel engine.