Gasoline composition

Abstract

A gasoline composition is disclosed comprising: (a) a major amount of gasoline; and (b) from 0.1 to 5 wt %, based on the overall gasoline composition, of a base oil having a kinematic viscosity at 100° C. of at least 1 cSt which is derived from the product of a Fischer-Tropsch synthesis process.

1 . A gasoline composition comprising:
 (a) a major amount of gasoline; and   (b) from 0.1 to 5 wt %, based on the overall gasoline composition, of a base oil having a kinematic viscosity at 100° C. of at least 1 cSt, which base oil is derived from the product of a Fischer-Tropsch synthesis process.   
   
   
       2 . The gasoline composition of  claim 1  wherein the amount of base oil is in the range of from 0.2 to 4.5 wt %, based on the overall gasoline composition. 
   
   
       3 . The gasoline composition of  claim 2  wherein the amount of base oil is in the range of from 0.25 to 3.5 wt %, based on the overall gasoline composition. 
   
   
       4 . The gasoline composition of  claim 3  wherein the amount of base oil is in the range of from 0.3 to 3.0 wt %, based on the overall gasoline composition. 
   
   
       5 . The gasoline composition of  claim 1  wherein the kinematic viscosity at 100° C. of the base oil is in the range of from 8 to 60 cSt. 
   
   
       6 . The gasoline composition of  claim 5  wherein the kinematic viscosity at 100° C. of the base oil is in the range of from 12 to 40 cSt. 
   
   
       7 . The gasoline composition of  claim 1  wherein the gasoline composition further comprises one or more non-Fischer-Tropsch derived base oil. 
   
   
       8 . The gasoline composition of  claim 1  wherein the gasoline composition further comprises one or more fuel additive. 
   
   
       9 . A process for preparing a gasoline composition, comprising bringing into admixture with gasoline, from 0.1 wt % to 5 wt %, based on the overall gasoline composition, of a base oil having a kinematic viscosity at 100° C. of at least 1 cSt, which is derived from the product of a Fischer-Tropsch synthesis process. 
   
   
       10 . A method of operating a four-stroke spark-ignition internal combustion engine containing a combustion chamber comprising introducing into the combustion chamber of said engine a gasoline composition of  claim 1 . 
   
   
       11 . A method of operating a four-stroke spark-ignition internal combustion engine containing a combustion chamber comprising introducing into the combustion chamber of said engine a gasoline composition of  claim 6 .