Engine oil compositions and preparation thereof

Abstract

A multi-grade engine oil composition meeting required specifications of manufacturers is provided. In one embodiment, the engine oil composition contains a sufficient amount of a Pour Point Reducing Blend Component for the engine oil to have cold crank simulator viscosity at −20° C. of less than have a cold crank simulator viscosity at −20° C. of less than 9000 cP and a mini rotary viscometer (MRV) viscosity at −20° C. of less than 60,000 cP. The Pour Point Reducing Blend Component is selected from 1) an isomerized Fischer-Tropsch derived bottoms product; 2) a bottoms product prepared from an isomerized highly waxy mineral oil, or 3) an isomerized oil having a kinematic viscosity at 100° C. of at least about 8 mm 2 /s made from polyethylene plastic.

1 . An engine oil composition meeting SAE J300 requirements comprising: (a) a base oil selected from a natural oil, a synthetic oil, and mixtures thereof, (b) 0.05 to 40 wt %. of at least an additive selected from the group of metal detergents, dispersants, wear inhibitors, anti-oxidants, friction modifiers, viscosity modifiers, corrosion inhibitors, seal swelling agents, metal deactivators, anti-foamants, and mixtures thereof; (c) a sufficient amount of a Pour Point Reducing Blend Component for the engine oil composition to have a cold crank simulator at −20° C. of less than 9000 cP and a kinematic, viscosity at 100° C. as specified according to SAE J330; 
 wherein the Pour Point Reducing Blend Component has an average degree of branching within a range of 6.5 to 10 alkyl branches per 100 carbon atoms.    
     
     
         2 . The composition of  claim 1 , wherein the Pour Point Reducing Blend Component has an average degree of branching within a range of 6.5 to 8 alkyl branches per 100 carbon atoms.  
     
     
         3 . The composition of  claim 1 , wherein the sufficient amount of Pour Point Reducing Blend Component ranges from 2 to 30 wt. % of the engine oil composition.  
     
     
         4 . The composition of  claim 3 , wherein the sufficient amount of Pour Point Reducing Blend Component ranges from 3 to 20 wt. %.  
     
     
         5 . The composition of  claim 4 , wherein the sufficient amount of Pour Point Reducing Blend Component ranges from 4 to 15 wt. %.  
     
     
         6 . The composition of  claim 1 , wherein the base oil is selected from the group of a mineral oil, a vegetable oil, an oligomer of an alphaolefin, an ester, an oil derived from a Fischer-Tropsch process, and mixtures thereof.  
     
     
         7 . The composition of  claim 5 , wherein the base oil is one of a poly-alpha-olefin, an ester base oil, or mixtures thereof.  
     
     
         8 . The composition of  claim 1 , wherein the Pour Point Reducing Blend Component is selected from an isomerized Fischer-Tropsch derived bottoms product, a bottoms product prepared from an isomerized highly waxy mineral oil, an isomerized oil having a kinematic viscosity at 100° C. of at least about 8 mm 2 /s made from polyethylene plastic and mixtures thereof.  
     
     
         9 . The composition of  claim 1 , wherein the Pour Point Reducing Blend Component has an average molecular weight between 600-100 Daltons.  
     
     
         10 . The composition of  claim 1 , wherein the Pour Point Reducing Blend Component has a kinematic viscosity at 100° C. of 8-22 (mm 2 /s) with a 10% point of the boiling range of the Pour Point Reducing Blend Component falling between about 850-1050° F.  
     
     
         11 . The composition of  claim 1 , wherein the Pour Point Reducing Blend Component has a pour point of −8 to −12° C.  
     
     
         12 . The composition of  claim 1 , wherein the composition comprises less than 15 wt. % of a viscosity index modifier.  
     
     
         13 . The composition of  claim 1 , wherein the composition comprises less than 10 wt. % of a viscosity index modifier.  
     
     
         14 . The composition of  claim 12 , wherein the composition comprises less than 5 wt. % of a viscosity index modifier.  
     
     
         15 . The composition of  claim 1 , wherein the composition contains at least 10% less viscosity index modifier compared to a comparable engine oil composition without the sufficient amount of Pour Point Reducing Blend Component.  
     
     
         16 . The composition of  claim 1 , wherein the composition results in at least 10% less deposit under the Panel Coker Test compared to a comparable composition without the sufficient amount of Pour Point Reducing Blend Component.  
     
     
         17 . The composition of  claim 15 , wherein the composition results in at least 25 % less deposit under the Panel Coker Test compared to a comparable composition without the sufficient amount of Pour Point Reducing Blend Component.  
     
     
         18 . The composition of  claim 16 , wherein the composition results in at least 50% less deposit under the Panel Coker Test compared to a comparable composition without the sufficient amount of Pour Point Reducing Blend Component.  
     
     
         19 . The composition of  claim 1 , wherein the composition is for use in a gasoline engines, diesel engines, motorcycles, trucks, motor homes, maintenance equipment, heavy equipment, street rods, military applications, and personal watercraft motors.  
     
     
         20 . A method to reduce the use of a viscosity index modifier in engine oil compositions meeting SAE J300 requirements, the method comprising adding to a base oil typically used for preparing engine oil compositions a sufficient amount of a Pour Point Reducing Blend Component having an average degree of branching within a range of 6.5 to 10 alkyl branches per 100 carbon atoms for the engine oil to have a cold crank simulator viscosity at −20° C. have a cold crank simulator viscosity at −20° C. of less than 9000 cP and a mini rotary viscometer (MRV) viscosity at −20° C. of less tan 60,000 cP.  
     
     
         21 . The method of  claim 19 , wherein the sufficient amount of the Pour Point Reducing Blend Component ranges from 2 to 30 wt. % of the engine oil composition.  
     
     
         22 . The method of  claim 19 , wherein the base oil typically used for preparing engine oil compositions is selected from the group of a mineral oil a vegetable oil, an oligomer of an alphaolefin, an ester, an oil derived from a Fischer-Tropsch process, and mixtures thereof.  
     
     
         23 . A method for preparing engine oil compositions meeting SAE J300 requirements, the method comprising blending into a mixture of: (a) 40 to 90 wt. % a base oil; (b) 0.05 to 40 wt. %. of at least an additive selected from the group of metal detergents, dispersants, wear inhibitors, anti-oxidants, friction modifiers, viscosity modifiers, corrosion inhibitors, seal swelling agents, metal deactivators, anti-foamants, and mixtures thereof, and (c) a sufficient amount of a Pour Point Reducing Blend Component having an average degree of branching within a range of 6.5 to 10 alkyl branches per 100 carbon atoms for the engine oil to have cold crank simulator viscosity at −20° C. of less than have a cold crank simulator viscosity at −20° C. of less than 9000 cP and a mini rotary viscometer (MRV) viscosity at −20° C. of less than 60,000 cP.