Traction coefficient reducing lubricating oil composition

Abstract

The present invention is directed to a traction coefficient reducing lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity comprising a blend of two or more isomerized Fischer-Tropsch derived base oils wherein the kinematic viscosity of the blend is in a range from about 2 to about 14 centistokes at 100° C., and (b) one or more lubricating oil additives wherein the lubricating oil composition is essentially free of friction modifiers. The present invention is also directed to a method for reducing the traction coefficient in internal combustion engines comprising lubricating the internal combustion engines with a lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity comprising a blend of two or more isomerized Fischer-Tropsch derived base oils wherein the kinematic viscosity of the blend is in a range from about 2 to about 14 centistokes at 100° C., and (b) one or more lubricating oil additives wherein the lubricating oil composition is essentially free of friction modifiers.

1 . A traction coefficient reducing lubricating oil composition for internal combustion engines comprising:
 (a) a major amount of an oil of lubricating viscosity comprising a blend of two or more isomerized Fischer-Tropsch derived base oils wherein the kinematic viscosity of the blend is in a range from about 2 to about 14 centistokes at 100° C.; and   (b) one or more lubricating oil additives;   
       wherein the lubricating oil composition is essentially free of friction modifiers. 
     
     
         2 . The lubricating oil composition of  claim 1 , wherein the lubricating oil composition further comprises one or more conventional base oils, and wherein the conventional base oil is a maximum of 30 weight percent based on the total weight of the lubricating oil composition. 
     
     
         3 . The lubricating oil composition of  claim 2 , wherein the lubricating oil composition further comprises one or more conventional base oils, and wherein the conventional base oil is a maximum of 10 weight percent based on the total weight of the lubricating oil composition. 
     
     
         4 . The lubricating oil composition of  claim 1 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 17 percent to about 47 percent, about 44 percent to about 74 percent and about 25 percent to about 55 percent, respectively. 
     
     
         5 . The lubricating oil composition of  claim 1 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 50 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 13 percent to about 43 percent, about 41 percent to about 71 percent and about 25 percent to about 55 percent, respectively. 
     
     
         6 . The lubricating oil composition of  claim 1 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 75 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 9 percent to about 39 percent, about 41 percent to about 71 percent and about 22 percent to about 52 percent, respectively. 
     
     
         7 . The lubricating oil composition of  claim 1 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 3 percent to about 28 percent, about 9 percent to about 39 percent and about 10 percent to about 40 percent, respectively. 
     
     
         8 . The lubricating oil composition of  claim 1 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 50 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 17 percent to about 47 percent, about 51 percent to about 81 percent and about 22 percent to about 52 percent, respectively. 
     
     
         9 . The lubricating oil composition of  claim 1 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 3 percent to about 28 percent, about 9 percent to about 39 percent and about 10 percent to about 40 percent, respectively. 
     
     
         10 . The lubricating oil composition of  claim 1 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 75 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 9 percent to about 39 percent, about 44 percent to about 74 percent and about 14 percent to about 44 percent, respectively. 
     
     
         11 . The lubricating oil composition of  claim 1 , wherein the oil of lubricating viscosity blend has a kinematic viscosity in the range from about 3 to about 12 centistokes at 100° C. 
     
     
         12 . The lubricating oil composition of  claim 11 , wherein the oil of lubricating viscosity blend has a kinematic viscosity in the range from about 4 to about 10 centistokes at 100° C. 
     
     
         13 . The lubricating oil composition of  claim 1 , wherein the oil of lubricating viscosity is a blend of (i) one or more low kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 2 to about 9 centistokes at 100° C. and (ii) one or more high kinematic viscosity isomerized Fisher-Tropsch derived base oil having a kinematic viscosity ranging from about 5 to about 16 centistokes at 100° C. 
     
     
         14 . The lubricating oil composition of  claim 13 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity ranging from about 3 to about 8 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity ranging from about 6 to about 15 centistokes at 100° C. 
     
     
         15 . The lubricating oil composition of  claim 14 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity of about 4 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity of about 14 centistokes at 100° C. 
     
     
         16 . The lubricating oil composition of  claim 1 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having greater than 95 weight percent saturates. 
     
     
         17 . The lubricating oil composition of  claim 1 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having less than 0.3 weight percent aromatics. 
     
     
         18 . The lubricating oil composition of  claim 1 , wherein the oil of lubricating viscosity is a blend of (i) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 99.0 weight percent to 1.0 to about 99.4 weight percent to about 0.6 weight percent and (ii) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 97.0 weight percent to 3.0 to about 95.0 weight percent to about 5.0 weight percent. 
     
     
         19 . A traction coefficient reducing lubricating oil composition for internal combustion engines comprising:
 (a) a major amount of an oil of lubricating viscosity comprising a blend of two or more isomerized Fischer-Tropsch derived base oils wherein the kinematic viscosity of the blend is in a range from about 2 to about 14 centistokes at 100° C.;   (b) one or more detergents;   (c) one or more dispersants;   (d) one or more anti-wear agents; and   (e) one or more anti-oxidants;   
       wherein the lubricating oil composition is essentially free of friction modifiers. 
     
     
         20 . The lubricating oil composition of  claim 19 , wherein the one or more detergents in (b) is a low, medium or high overbased metal sulfonate, metal phenate, metal salicylate, or any combination thereof; (c) is a post-treated dispersant, a non-post-treated dispersant, or any combination thereof; (d) is a metal di-thio di-phosphate or a metal tri-borate, or any combination thereof; and (e) is a molybdenum anti-oxidant, di-phenyl amine anti-oxidant, or a phenolic anti-oxidant, or any combination thereof. 
     
     
         21 . The lubricating oil composition of  claim 20 , wherein (b) is a mixture of a lower overbased alkylaromatic sulfonate, a medium overbased alkylaromatic salicylate and a high overbased alkylphenate; (c) is a mixture of borated bissuccinimide, and a ethylene carbonated bissuccinimide; (d) is a mixture of zinc di-thio di-phosphate and a potassium tri-borate; and (e) is a mixture of molybdenum-succinimide complex, an octylbutyl diphenyl amine and a phenolic anti-oxidant. 
     
     
         22 . The lubricating oil composition of  claim 19 , wherein the lubricating oil composition further comprises one or more conventional base oils, and wherein the conventional base oil is a maximum of 30 weight percent based on the total weight of the lubricating oil composition. 
     
     
         23 . The lubricating oil composition of  claim 22 , wherein the lubricating oil composition further comprises one or more conventional base oils, and wherein the conventional base oil is a maximum of 10 weight percent based on the total weight of the lubricating oil composition. 
     
     
         24 . The lubricating oil composition of  claim 19 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 17 percent to about 47 percent, about 44 percent to about 74 percent and about 25 percent to about 55 percent, respectively. 
     
     
         25 . The lubricating oil composition of  claim 19 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 50 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 13 percent to about 43 percent, about 41 percent to about 71 percent and about 25 percent to about 55 percent, respectively. 
     
     
         26 . The lubricating oil composition of  claim 19 , wherein the reduction in the traction coefficients of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 75 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 9 percent to about 39 percent, about 41 percent to about 71 percent and about 22 percent to about 52 percent, respectively. 
     
     
         27 . The lubricating oil composition of  claim 19 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 3 percent to about 28 percent, about 9 percent to about 39 percent and about 10 percent to about 40 percent, respectively. 
     
     
         28 . The lubricating oil composition of  claim 19 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 50 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 17 percent to about 47 percent, about 51 percent to about 81 percent and about 22 percent to about 52 percent, respectively. 
     
     
         29 . The lubricating oil composition of  claim 19 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 3 percent to about 28 percent, about 9 percent to about 39 percent and about 10 percent to about 40 percent, respectively. 
     
     
         30 . The lubricating oil composition of  claim 19 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 75 and at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 9 percent to about 39 percent, about 44 percent to about 74 percent and about 14 percent to about 44 percent, respectively. 
     
     
         31 . The lubricating oil composition of  claim 19 , wherein the oil of lubricating viscosity blend has a kinematic viscosity in the range from about 3 to about 12 centistokes at 100° C. 
     
     
         32 . The lubricating oil composition of  claim 31 , wherein the oil of lubricating viscosity blend has a kinematic viscosity in the range from about 4 to about 10 centistokes at 100° C. 
     
     
         33 . The lubricating oil composition of  claim 19 , wherein the oil of lubricating viscosity is a blend of (i) one or more low kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 2 to about 9 centistokes at 100° C. and (ii) one or more high kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 5 to about 16 centistokes at 100° C. 
     
     
         34 . The lubricating oil composition of  claim 33 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity ranging from about 3 to about 8 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity ranging from about 6 to about 15 centistokes at 100° C. 
     
     
         35 . The lubricating oil composition of  claim 34 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity of about 4 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity of about 14 centistokes at 100° C. 
     
     
         36 . The lubricating oil composition of  claim 19 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having greater than 95 weight percent saturates. 
     
     
         37 . The lubricating oil composition of  claim 19 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having less than 0.3 weight percent aromatics. 
     
     
         38 . The lubricating oil composition of  claim 19 , wherein the oil of lubricating viscosity is a blend of (i) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 99.0 weight percent to 1.0 to about 99.4 weight percent to about 0.6 weight percent and (ii) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 97.0 weight percent to 3.0 to about 95.0 weight percent to about 5.0 weight percent. 
     
     
         39 . A method for reducing the traction coefficient in internal combustion engines comprising lubricating the internal combustion engines with a lubricating oil composition comprising:
 (a) a major amount of an oil of lubricating viscosity comprising a blend of two or more isomerized Fischer-Tropsch derived base oils wherein the kinematic viscosity of the blend is in a range from about 2 to about 14 centistokes at 100; and   (b) one or more lubricating oil additives;   
       wherein the lubricating oil composition is essentially free of friction modifiers. 
     
     
         40 . The method of  claim 39 , wherein the lubricating oil composition further comprises one or more conventional base oils, and wherein the conventional base oil is a maximum of 30 weight percent based on the total weight of the lubricating oil composition. 
     
     
         41 . The method of  claim 40 , wherein the lubricating oil composition further comprises one or more conventional base oils, and wherein the conventional base oil is a maximum of 10 weight percent based on the total weight of the lubricating oil composition. 
     
     
         42 . The method of  claim 39 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at a speeds of 10, 100 and 1,000 millimeters per second is in the range of about 17 percent to about 47 percent, about 44 percent to about 74 percent and about 25 percent to about 55 percent, respectively. 
     
     
         43 . The method of  claim 39 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 50 and at a speed of 10, 100 and 1,000 millimeters per second is in the range of about 13 percent to about 43 percent, about 41 percent to about 71 percent and about 25 percent to about 55 percent, respectively. 
     
     
         44 . The method of  claim 39 , wherein the reduction in the traction coefficient of the lubricating oil composition compared to Group II base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 75 and at at speeds of 10, 100 and 1,000 millimeters per second is in the range of about 9 percent to about 39 percent, about 41 percent to about 71 percent and about 22 percent to about 52 percent, respectively. 
     
     
         45 . The method of  claim 39 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at a speeds of 10, 100 and 1,000 millimeters per second is in the range of about 3 percent to about 28 percent, about 9 percent to about 39 percent and about 10 percent to about 40 percent, respectively. 
     
     
         46 . The method of  claim 39 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 50 and at a speeds of 10, 100 and 1,000 millimeters per second is in the range of about 17 percent to about 47 percent, about 51 percent to about 81 percent and about 22 percent to about 52 percent, respectively. 
     
     
         47 . The method of  claim 39 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 25 and at a speeds of 10, 100 and 1,000 millimeters per second is in the range of about 3 percent to about 28 percent, about 9 percent to about 39 percent and about 10 percent to about 40 percent, respectively. 
     
     
         48 . The method of  claim 39 , wherein the percentage reduction in traction coefficient of the lubricating oil composition compared to Group III base oils at 100° C., an average contact pressure of 433 Mpa and a maximum contact pressure of 649 MPa, a slide to roll ratio of 75 and at a speeds of 10, 100 and 1,000 millimeters per second is in the range of about 9 percent to about 39 percent, about 44 percent to about 74 percent and about 14 percent to about 44 percent, respectively. 
     
     
         49 . The method of  claim 39 , wherein the oil of lubricating viscosity blend has a kinematic viscosity in the range from about 3 to about 12 centistokes at 100° C. 
     
     
         50 . The method of  claim 49 , wherein the oil of lubricating viscosity blend has a kinematic viscosity in the range from about 4 to about 10 centistokes at 100° C. 
     
     
         51 . The method of  claim 39 , wherein the oil of lubricating viscosity is a blend of (i) one or more low kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 2 to about 9 centistokes at 100° C. and (ii) one or more high kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 5 to about 16 centistokes at 100° C. 
     
     
         52 . The method of  claim 51 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 3 to about 8 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 6 to about 15 centistokes at 100° C. 
     
     
         53 . The method of  claim 52 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity of about 4 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity of about 14 centistokes at 100° C. 
     
     
         54 . The method of  claim 39 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having greater than 95 weight percent saturates. 
     
     
         55 . The method of  claim 39 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having less than 0.3 weight percent aromatics. 
     
     
         56 . The method of  claim 39 , wherein the oil of lubricating viscosity is a blend of (i) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 99.0 weight percent to 1.0 to about 99.4 weight percent to about 0.6 weight percent and (ii) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 97.0 weight percent to 3.0 to about 95.0 weight percent to about 5.0 weight percent. 
     
     
         57 . The method of  claim 39 , wherein the one or more additives in (b) comprises (i) one or more detergents; (ii) one or more dispersants; (iii) one or more anti-wear agents; and (iv) one or more anti-oxidants. 
     
     
         58 . The method of  claim 39 , wherein (i) a low, medium or high overbased metal sulfonate, metal phenate, metal salicylate, or any combination thereof; (ii) a post-treated dispersant, a non-post-treated dispersant, or any combination thereof; (iii) a metal di-thio di-phosphate or a metal tri-borate, or any combination thereof; and (iv) a molybdenum anti-oxidant, di-phenyl amine or a phenolic anti-oxidant, or any combination thereof. 
     
     
         59 . The method of  claim 58 , wherein (i) is a mixture of a low overbased alkylaromatic sulfonate, a medium overbased alkylaromatic salicylate and a high overbased alkylphenate; (ii) is a mixture of a borated bissuccinimide and an ethylene carbonated bissuccinimide; (ii) is a mixture of zinc di-thio di-phosphate and a potassium tri-borate; and (iv) is a mixture of a molybdenum-succinimide complex, an octylbutyl diphenyl amine and a phenolic anti-oxidant. 
     
     
         60 . A traction coefficient reducing lubricating oil concentrate for internal combustion engines comprising:
 (a) from about 10 weight percent to about 90 weight percent of an oil of lubricating viscosity comprising a conventional base oil, or a isomerized Fischer-Tropsch derived base oils, or any combination thereof; and (b) one or more lubricating oil additives;   
       wherein the lubricating oil concentrate is essentially free of friction modifiers. 
     
     
         61 . The lubricating oil concentrate of  claim 60 , wherein the oil of lubricating viscosity has a kinematic viscosity in the range from about 3 to about 12 centistokes at 100° C. 
     
     
         62 . The lubricating oil concentrate of  claim 61 , wherein the oil of lubricating viscosity has a kinematic viscosity in the range from about 4 to about 10 centistokes at 100° C. 
     
     
         63 . The lubricating oil concentrate of  claim 62 , wherein the oil of lubricating viscosity is a blend of (i) one or more low kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 2 to about 9 centistokes at 100° C. and (ii) one or more high kinematic viscosity isomerized Fischer-Tropsch derived base oil having a kinematic viscosity ranging from about 5 to about 16 centistokes at 100° C. 
     
     
         64 . The lubricating oil concentrate of  claim 63 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity ranging from about 3 to about 8 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity ranging from about 6 to about 15 centistokes at 100° C. 
     
     
         65 . The lubricating oil concentrate of  claim 64 , wherein the oil of lubricating viscosity is a blend of (i) the low kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity of about 4 centistokes at 100° C. and (ii) the high kinematic viscosity isomerized Fischer-Tropsch derived base oil has a kinematic viscosity of about 14 centistokes at 100° C. 
     
     
         66 . The lubricating oil concentrate of  claim 60 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having greater than 95 weight percent saturates. 
     
     
         67 . The lubricating oil concentrate of  claim 60 , wherein the oil of lubricating viscosity blend has isomerized Fischer-Tropsch derived base oils having less than 0.3 weight percent aromatics. 
     
     
         68 . The lubricating oil concentrate of  claim 60 , wherein the oil of lubricating viscosity is a blend of (i) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 99.0 weight percent to 1.0 to about 99.4 weight percent to about 0.6 weight percent and (ii) an isomerized Fischer-Tropsch derived base oil having a ratio of paraffinic carbons to naphthenic carbons in the range of 97.0 weight percent to 3.0 to about 95.0 weight percent to about 5.0 weight percent. 
     
     
         69 . A traction coefficient reducing lubricating oil concentrate for internal combustion engines comprising:
 (a) a major amount of an oil of lubricating viscosity comprising a conventional base oil, or an isomerized Fischer-Tropsch derived base oil, or any combination thereof; and   (b) one or more detergents;   (c) one or more dispersants;   (d) one or more anti-wear agents; and   (e) one or more anti-oxidants;   
       wherein the lubricating oil concentrate is essentially free of friction modifiers. 
     
     
         70 . The lubricating oil concentrate of  claim 69 , wherein the one or more detergents in (b) is a low, medium or high overbased metal sulfonate, metal phenate, metal salicylate, or any combination thereof; (c) is a post-treated dispersant, a non-post-treated dispersant, or any combination thereof; (d) is a metal-di-thio di-phosphate or a metal tri-borate, or any combination thereof; and (e) is a molybdenum anti-oxidant, di-phenyl amine anti-oxidant, or a phenolic anti-oxidant, or any combination thereof. 
     
     
         71 . The lubricating oil concentrate of  claim 69 , wherein (b) is a mixture of a low overbased alkylaromatic sulfonate, a medium overbased alkylaromatic salicylate and a high overbased alkylphenate; (c) is a mixture of borated bissuccinimide and an ethylene carbonated bissuccinimide and an untreated succinimide; (d) is a mixture of zinc di-thio di-phosphate and a potassium tri-borate; and (e) is a mixture of molybdenum-succinimide complex, an octylbutyl diphenyl amine, a phenolic anti-oxidant.