Engine oil lubricant compostions and methods for making same with superior oil consumption

Abstract

Provided is an engine oil lubricant composition with improved fuel economy. The engine oil lubricant composition may include about 40 wt % to about 80 wt % of a first oil base stock consisting of a Group IV base oil and about 10 wt % to about 40 wt % of a second oil base stock that is not a Group IV base oil, where these weight percents are based on the total weight of the engine oil lubricant composition. The engine oil lubricant composition can have an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C., a Noack volatility (ASTM D5800) of 25% or less, and an evaporation rate of 6% or less as measured by distillation method DIN 51454 mod. C17-C19.

1 . An engine oil lubricant composition comprising:
 about 40 wt % to about 80 wt % of a first oil base stock consisting of a Group IV base oil, and   about 10 wt % to about 40 wt % of a second oil base stock that is not a Group IV base oil, where the weight percents are based on the total weight of the engine oil lubricant composition, wherein the engine oil lubricant composition has an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C., a Noack volatility (ASTM D5800) of 25% or less, and an evaporation rate of 6% or less as measured by distillation method DIN 51454 mod. C17-C19.   
     
     
         2 . The lubricant composition of  claim 1 , wherein the HTHS (ASTM D4683) is less than or equal to 2.0 cP at 150° C. 
     
     
         3 . The lubricant composition of  claim 1 , further comprising a third base oil stock comprising a Group I, Group II, Group III, Group IV or Group V base oil. 
     
     
         4 . The lubricating engine oil of  claim 1 , wherein the second oil base stock comprises a Group II base oil. 
     
     
         5 . The lubricant composition of  claim 3 , wherein the Group II base stock is a Gas to-Liquids (GTL) base stock. 
     
     
         6 . The lubricant composition of  claim 3 , wherein the Group V base stock has a kinematic viscosity at 100° C. of from 2 to 6 cSt. 
     
     
         7 . The lubricant composition of  claim 3 , wherein the Group V base stock has a kinematic viscosity at 100° C. of 5 cSt or less. 
     
     
         8 . The lubricant composition of  claim 1 , further comprising one or more anti-wear additives, other viscosity modifiers, antioxidants, detergents, other dispersants, pour point depressants, corrosion inhibitors, metal deactivators, seal compatibility additives, anti-foam agents, inhibitors, anti-rust additives, or any one or more combinations thereof. 
     
     
         9 . An engine oil lubricant composition comprising:
 about 40 wt % to about 80 wt % of a first oil base stock consisting of a Group IV base oil, and   about 10 wt % to about 40 wt % of a second oil base stock comprising a Group II base oil, where the weight percents are based on the total weight of the engine oil lubricant composition,   wherein the engine oil lubricant composition has an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C., a Noack volatility (ASTM D5800) of 25% or less, and an evaporation rate of 6% or less as measured by distillation method DIN 51454 mod. C17-C19.   
     
     
         10 . The lubricant composition of  claim 9 , wherein the HTHS (ASTM D4683) is less than or equal to 2.0 cP at 150° C. 
     
     
         11 . The lubricant composition of  claim 9 , further comprising a third base oil stock comprising a Group I, Group III, or Group V base oil. 
     
     
         12 . The lubricant composition of  claim 9 , further comprising a third base oil stock comprising a Group V base stock that has a kinematic viscosity at 100° C. of from 2 to 6 cSt. 
     
     
         13 . The lubricant composition of  claim 9 , further comprising a third base oil stock comprising a Group V base stock that has a kinematic viscosity at 100° C. of 5 cSt or less. 
     
     
         14 . The lubricant composition of  claim 9 , further comprising one or more anti-wear additives, other viscosity modifiers, antioxidants, detergents, other dispersants, pour point depressants, corrosion inhibitors, metal deactivators, seal compatibility additives, anti-foam agents, inhibitors, anti-rust additives, or any one or more combinations thereof. 
     
     
         15 . The lubricant composition of  claim 9 , wherein the Group II base stock is a Gas to-Liquids (GTL) base stock. 
     
     
         16 . An engine oil lubricant composition comprising:
 about 40 wt % to about 80 wt % of a first oil base stock consisting of a Group IV base oil, about 10 wt % to about 40 wt % of a second oil base stock comprising a Group II base oil, where the weight percents are based on the total weight of the engine oil lubricant composition, and   at least 5 wt % of a third base oil stock comprising a Group V base stock that has a kinematic viscosity at 100° C. of from 2 to 6 cSt,   wherein the engine oil lubricant composition has an HTHS (ASTM D4683) of less than or equal to 2.2 cP at 150° C., a Noack volatility (ASTM D5800) of 25% or less, and an evaporation rate of 6% or less as measured by distillation method DIN 51454 mod. C17-C19.   
     
     
         17 . The lubricant composition of  claim 16 , wherein the third base oil stock comprising the Group V base stock has a kinematic viscosity at 100° C. of 2 to 5 cSt. 
     
     
         18 . The lubricant composition of  claim 16 , wherein the HTHS (ASTM D4683) is less than or equal to 2.0 cP at 150° C. 
     
     
         19 . The lubricant composition of  claim 16 , wherein the Group II base stock is a Gas to-Liquids (GTL) base stock. 
     
     
         20 . The lubricant composition of  claim 16 , further comprising one or more anti-wear additives, other viscosity modifiers, antioxidants, detergents, other dispersants, pour point depressants, corrosion inhibitors, metal deactivators, seal compatibility additives, anti-foam agents, inhibitors, anti-rust additives, or any one or more combinations thereof.