Lubricating oil compositions with improved deposit resistance and methods thereof

Abstract

Provided is a lubricating oil composition and method of using such a composition that provides for improved high temperature deposit resistance. The composition includes a lubricating oil base stock at from 20 to 95 wt % of the composition, at least one ashless organic friction modifier at from 0.1 to 20 wt % of the composition, and at least one overbased detergent at from 0.1 to 20 wt % of the composition. The remainder of composition includes one or more other lubricating oil additives. The deposit resistance of the lubricating oil composition as measured by TEOST 33C total deposits is at least 20% lower than the deposit resistance for a comparable lubricating oil composition not including the combination of the at least one ashless organic friction modifier and the at least one overbased detergent.

1 . A lubricating oil composition comprising:
 a lubricating oil base stock at from 20 to 95 wt % of the composition, at least one ashless organic friction modifier at from 0.1 to 20 wt % of the composition, at least one overbased detergent at from 0.1 to 20 wt % of the composition, and wherein the remainder of the lubricating oil composition includes one or more other lubricating oil additives;   wherein the at least one ashless organic friction modifier is selected from the group consisting of   
       
         
           
           
               
               
           
         
       
       wherein A and B are each independently H, a C1-C24 alkyl, or a C2-C24 alkenyl; 
       
         
           
           
               
               
           
         
       
       wherein A, B and C are each independently H, a C1-C24 alkyl, a C2-C24 alkenyl, a C1-C24 alkylcarbonyl, and a C1-C24 alkenylcarbonyl; 
       
         
           
           
               
               
           
         
       
       wherein A is a C1-C24 alkyl, or a C2-C24 alkenyl and B is O, an amino, a C1-C8 alkylamino or a C1-C8 dialkylamino;
 n-tallow 1,3 diaminopropane; a polymeric organic friction modifier containing PIBSA, glycerol and oligomerized ethylene oxide and combinations thereof; and 
 wherein the deposit resistance as measured by TEOST 33C total deposits (ASTM D6335) is at least 20% lower than the deposit resistance for a comparable lubricating oil composition not including the combination of the at least one ashless organic friction modifier and the at least one overbased detergent. 
 
     
     
         2 . The composition of  claim 1 , wherein the lubricating oil base stock is selected from the from the group consisting of a Group I base stock, a Group II base stock, a Group III base stock, a Group IV base stock, a Group V base stock and combinations thereof. 
     
     
         3 . The composition of  claim 1 , wherein the lubricating oil base stock is from 85 to 95 wt % of the lubricating oil composition. 
     
     
         4 . The composition of  claim 3 , wherein the lubricating oil base stock is selected from the group consisting of a 100N Group I base stock, a 4.5 cSt Group II base stock, a 4 cSt gas to liquids (GTL) base stock, a 4 cSt polyalphaolefin (PAO) base stock, a di-isononyl phthalate ester base stock and combinations thereof. 
     
     
         5 . The composition of  claim 1 , wherein the at least one overbased detergent is metal containing detergent including sulfonates, phenates, salicylates, carboxylates and combinations thereof and having a Total Base Number (TBN) ranging between 60 and 600. 
     
     
         6 . The composition of  claim 5 , wherein the at least one overbased detergent is selected from the group consisting of 350 TBN calcium salicylate, 400 TBN magnesium sulfonate, 400 TBN calcium sulfonate, 255 TBN calcium phenate, 68 TBN calcium salicylate and combinations thereof. 
     
     
         7 . The composition of  claim 1 , wherein the at least one ashless organic friction modifier is selected from the group consisting of mixed mono-(47%), di-(33%) and tri-(20%) fatty acids using saturated C16 and C18 alkyl chains, glycerol mono-, di- and tri-mixed oleate, propylene glycol stearyl ether, poly-hydroxylcarboxylic acid esters of polyalkylene oxide modified polyols, oleic acid, oleyl amide, and combinations thereof. 
     
     
         8 . The composition of  claim 7 , wherein the at least one ashless organic friction modifier is mixed mono-(47%), di-(33%) and tri-(20%) fatty acids using saturated C16 and C18 alkyl chains at from 0.1 to 2.0 wt % of the lubricating oil composition. 
     
     
         9 . The composition of  claim 1 , wherein the deposit resistance as measured by TEOST 33C total deposits (ASTM D6335) is less than or equal to 75 mg. 
     
     
         10 . The composition of  claim 1 , wherein the one or more other lubricating oil additives are selected from the group consisting of an anti-wear additive, viscosity index improver, antioxidant, dispersant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, anti-rust additive, and ash forming metal containing friction modifier. 
     
     
         11 . The composition of  claim 1 , wherein the one or more other lubricating oil additives range from 1 to 10 wt % of the lubricating oil composition and include a combination of a PIBSA/PAM dispersant, a C3/C6 secondary ZDDP antiwear additive, and a diphenylamine antioxidant. 
     
     
         12 . The composition of  claim 1 , wherein the lubricating oil base stock has a kinematic viscosity at 100 deg. C. ranging from 2.5 to 12 cSt. 
     
     
         13 . The composition of  claim 1 , wherein lubricating oil composition is an SAE viscosity grade selected from the group consisting of 0W-30, 5W-30, 0W-20, 5W-20, 0W-16, 5W-16, 0W-12, 5W-12, 0W-8, and 5W-8. 
     
     
         14 . The composition of  claim 1 , wherein the lubricating oil composition is a passenger vehicle engine oil (PVEO) or a commercial vehicle engine oil (CVEO). 
     
     
         15 . A method for improving the high temperature deposit resistance of a lubricating oil composition for use in lubricating a mechanical component comprising:
 providing a lubricating oil composition to a mechanical component, wherein the lubricating oil composition comprises: a lubricating oil base stock at from 20 to 95 wt % of the composition, at least one ashless organic friction modifier at from 0.1 to 20 wt % of the composition, at least one overbased detergent at from 0.1 to 20 wt % of the composition, and wherein the remainder of the lubricating oil composition includes one or more other lubricating oil additives;   wherein the at least one ashless organic friction modifier is selected from the group consisting of   
       
         
           
           
               
               
           
         
       
       wherein A and B are each independently H, a C1-C24 alkyl, or a C2-C24 alkenyl; 
       
         
           
           
               
               
           
         
       
       wherein A, B and C are each independently H, a C1-C24 alkyl, a C2-C24 alkenyl, a C1-C24 alkylcarbonyl, and a C1-C24 alkenylcarbonyl; 
       
         
           
           
               
               
           
         
       
       wherein A is a C1-C24 alkyl, or a C2-C24 alkenyl and B is O, an amino, a C1-C8 alkylamino or a C1-C8 dialkylamino;
 n-tallow 1,3 diaminopropane; a polymeric organic friction modifier containing PIBSA, glycerol and oligomerized ethylene oxide and combinations thereof; and 
 wherein the deposit resistance as measured by TEOST 33C total deposits (ASTM D6335) is at least 20% lower than the deposit resistance for a comparable lubricating oil composition not including the combination of the at least one ashless organic friction modifier and the at least one overbased detergent. 
 
     
     
         16 . The method of  claim 15 , wherein the lubricating oil base stock is selected from the from the group consisting of a Group I base stock, a Group II base stock, a Group III base stock, a Group IV base stock, a Group V base stock and combinations thereof. 
     
     
         17 . The method of  claim 15 , wherein the lubricating oil base stock is from 85 to 95 wt % of the lubricating oil composition. 
     
     
         18 . The method of  claim 15 , wherein the lubricating oil base stock is selected from the group consisting of a 100N Group I base stock, a 4.5 cSt Group II base stock, a 4 cSt gas to liquids (GTL) base stock, a 4 cSt polyalphaolefin (PAO) base stock, a di-isononyl phthalate ester base stock and combinations thereof. 
     
     
         19 . The method of  claim 15 , wherein the at least one overbased detergent is metal containing detergent including sulfonates, phenates, salicylates, carboxylates and combinations thereof and having a Total Base Number (TBN) ranging between 60 and 600. 
     
     
         20 . The method of  claim 19 , wherein the at least one overbased detergent is selected from the group consisting of 350 TBN calcium salicylate, 400 TBN magnesium sulfonate, 400 TBN calcium sulfonate, 255 TBN calcium phenate, 68 TBN calcium salicylate and combinations thereof. 
     
     
         21 . The method of  claim 15 , wherein the at least one ashless organic friction modifier is selected from the group consisting of mixed mono-(47%), di-(33%) and tri-(20%) fatty acids using saturated C16 and C18 alkyl chains, glycerol mono-, di- and tri-mixed oleate, propylene glycol stearyl ether, poly-hydroxylcarboxylic acid esters of polyalkylene oxide modified polyols, oleic acid, oleyl amide, and combinations thereof. 
     
     
         22 . The method of  claim 21 , wherein the at least one ashless organic friction modifier is mixed mono-(47%), di-(33%) and tri-(20%) fatty acids using saturated C16 and C18 alkyl chains at from 0.1 to 2.0 wt % of the lubricating oil composition. 
     
     
         23 . The method of  claim 15 , wherein the deposit resistance as measured by TEOST 33C total deposits (ASTM D6335) is less than or equal to 75 mg. 
     
     
         24 . The method of  claim 15 , wherein the one or more other lubricating oil additives are selected from the group consisting of an anti-wear additive, viscosity index improver, antioxidant, dispersant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, anti-rust additive, and ash forming metal containing friction modifier. 
     
     
         25 . The method of  claim 24 , wherein the one or more other lubricating oil additives range from 1 to 10 wt % of the lubricating oil composition and include a combination of a PIBSA/PAM dispersant, a C3/C6 secondary ZDDP antiwear additive, and a diphenylamine antioxidant. 
     
     
         26 . The method of  claim 15 , wherein the lubricating oil base stock has a kinematic viscosity at 100 deg. C. ranging from 2.5 to 12 cSt. 
     
     
         27 . The method of  claim 15 , wherein the mechanical component is selected from the group consisting of internal combustion engines, power trains, drivelines, transmissions, gears, gear trains, gear sets, compressors, pumps, hydraulic systems, bearings, bushings, turbines, pistons, piston rings, cylinder liners, cylinders, cams, tappets, lifters, bearings (journal, roller, tapered, needle, ball), gears and valves. 
     
     
         28 . The method of  claim 27 , wherein the mechanical component is an internal combustion engine. 
     
     
         29 . The method of  claim 28 , wherein lubricating oil composition is an SAE viscosity grade selected from the group consisting of 0W-30, 5W-30, 0W-20, 5W-20, 0W-16, 5W-16, 0W-12, 5W-12, 0W-8, and 5W-8. 
     
     
         30 . The method of  claim 29 , wherein the lubricating oil composition is a passenger vehicle engine oil (PVEO) or a commercial vehicle engine oil (CVEO).