Low sulfur and low phosphorus lubricating oil composition

Abstract

The present invention is directed to a low sulfur and low phosphorus lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity and (b) one or more dispersants (c) one or more anti-oxidants and (d) one or more detergents, wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds. The present invention is also directed to a low sulfur and low phosphorus lubricating oil composition comprising (a) an oil of lubricating viscosity (b) a borated dispersant and a non-borated dispersant (c) a molybdenum anti-oxidant and a phenolic anti-oxidant and (d) a high overbased and a low overbased calcium sulfonate, wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds. The present invention is also directed to method for lubricating internal combustion engines, which comprises lubricating the engine with a low sulfur and low phosphorus lubricating oil compositions of the present invention.

1 . A low sulfur and low phosphorus lubricating oil composition comprising: 
 (a) a major amount of an oil of lubricating viscosity;    (b) one or more dispersants;    (c) one or more anti-oxidants; and    (d) one or more detergents;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       2 . The lubricating oil composition of  claim 1 , wherein the concentration of the zinc di-alkyl di-thiophosphates in the lubricating oil composition is less than 0.2 weight percent based on the total weight of the lubricating oil composition.  
   
   
       3 . The lubricating oil composition of  claim 2 , wherein the concentration of the zinc di-alkyl di-thiophosphates in the lubricating oil composition is less than 0.1 weight percent based on the total weight of the lubricating oil composition.  
   
   
       4 . The lubricating oil composition of  claim 3 , wherein the concentration of the zinc di-alkyl di-thiophosphates in the lubricating oil composition is 0.0 weight percent based on the total weight of the lubricating oil composition.  
   
   
       5 . The lubricating oil composition of  claim 1 , wherein the sulfur content is in the range of 0.0 weight percent to about 0.09 weight percent based on the total weight of the lubricating oil composition.  
   
   
       6 . The lubricating oil composition of  claim 5 , wherein the sulfur content is in the range of 0.01 weight percent to about 0.07 weight percent based on the total weight of the lubricating oil composition.  
   
   
       7 . The lubricating oil composition of  claim 6 , wherein the sulfur content is in the range of 0.02 weight percent to about 0.05 weight percent based on the total weight of the lubricating oil composition.  
   
   
       8 . The lubricating oil composition of  claim 1 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.03 weight percent based on the total weight of the lubricating oil composition.  
   
   
       9 . The lubricating oil composition of  claim 8 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.02 weight percent based on the total weight of the lubricating oil composition.  
   
   
       10 . The lubricating oil composition of  claim 9 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.01 weight percent based on the total weight of the lubricating oil composition.  
   
   
       11 . The lubricating oil composition of  claim 10 , wherein the phosphorus content is 0.0 weight percent based on the total weight of the lubricating oil composition.  
   
   
       12 . The lubricating oil composition of  claim 1 , wherein the one or more detergents in (d) is not an overbased metal phenate, an overbased metal salicylate or an overbased metal carboxylate.  
   
   
       13 . A low sulfur and low phosphorus lubricating oil composition comprising: 
 (a) a major amount of an oil of lubricating viscosity;    (b) a borated dispersant and a non-borated dispersant;    (c) a molybdenum-containing anti-oxidant and a phenolic anti-oxidant; and    (d) a high overbased and a low overbased calcium sulfonate;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       14 . The lubricating oil composition of  claim 13 , wherein the concentration of the zinc di-alkyl di-thiophosphates in the lubricating oil composition is less than 0.2 weight percent based on the total weight of the lubricating oil composition.  
   
   
       15 . The lubricating oil composition of  claim 14 , wherein the concentration of the zinc di-alkyl di-thiophosphates in the lubricating oil composition is less than 0.1 weight percent based on the total weight of the lubricating oil composition.  
   
   
       16 . The lubricating oil composition of  claim 15 , wherein the concentration of the zinc di-alkyl di-thiophosphates in the lubricating oil composition is 0.0 weight percent based on the total weight of the lubricating oil composition.  
   
   
       17 . The lubricating oil composition of  claim 13 , wherein the sulfur content is in the range of 0.0 weight percent to about 0.09 weight percent based on the total weight of the lubricating oil composition.  
   
   
       18 . The lubricating oil composition of  claim 17 , wherein the sulfur content is in the range of 0.01 weight percent to about 0.07 weight percent based on the total weight of the lubricating oil composition.  
   
   
       19 . The lubricating oil composition of  claim 18 , wherein the sulfur content is in the range of 0.02 weight percent to about 0.05 weight percent based on the total weight of the lubricating oil composition.  
   
   
       20 . The lubricating oil composition of  claim 13 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.03 weight percent based on the total weight of the lubricating oil composition.  
   
   
       21 . The lubricating oil composition of  claim 20 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.02 weight percent based on the total weight of the lubricating oil composition.  
   
   
       22 . The lubricating oil composition of  claim 21 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.01 weight percent based on the total weight of the lubricating oil composition.  
   
   
       23 . The lubricating oil composition of  claim 22 , wherein the phosphorus content is 0.0 weight percent based on the total weight of the lubricating oil composition.  
   
   
       24 . The lubricating oil composition of  claim 13 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylates or an overbased metal carboxylate.  
   
   
       25 . A low sulfur and low phosphorus lubricating oil composition consisting essentially of: 
 (a) a major amount of an oil of lubricating viscosity;    (b) one or more dispersants;    (c) one or more anti-oxidants;    (d) one or more detergents; and    (e) one or more additives selected from one or more viscosity index improvers, ashless sulfur extreme pressure agents, alkaline earth metal and alkali metal borated extreme pressure agents, molybdenum-containing extreme pressure agents, pour point depressants, rust inhibitors, corrosion inhibitors, ash-containing friction modifiers, ashless friction modifiers, molybdenum-containing friction modifiers, metal deactivators, seal swell agents, demulsifiers and anti-foaming agents;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       26 . The lubricating oil composition of  claim 25 , wherein the sulfur content is in the range of 0.0 weight percent to about 0.09 weight percent based on the total weight of the lubricating oil composition.  
   
   
       27 . The lubricating oil composition of  claim 26 , wherein the sulfur content is in the range of 0.01 weight percent to about 0.07 weight percent based on the total weight of the lubricating oil composition.  
   
   
       28 . The lubricating oil composition of  claim 27 , wherein the sulfur content is in the range of 0.02 weight percent to about 0.05 weight percent based on the total weight of the lubricating oil composition.  
   
   
       29 . The lubricating oil composition of  claim 25 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.03 weight percent based on the total weight of the lubricating oil composition.  
   
   
       30 . The lubricating oil composition of  claim 29 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.02 weight percent based on the total weight of the lubricating oil composition.  
   
   
       31 . The lubricating oil composition of  claim 30 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.01 weight percent based on the total weight of the lubricating oil composition.  
   
   
       32 . The lubricating oil composition of  claim 31 , wherein the phosphorus content is 0.0 weight percent based on the total weight of the lubricating oil composition.  
   
   
       33 . The lubricating oil composition of  claim 25 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylates or an overbased metal carboxylate.  
   
   
       34 . A low sulfur and low phosphorus lubricating oil composition consisting essentially of: 
 (a) a major amount of an oil of lubricating viscosity;    (b) a borated dispersant and a non-borated dispersant;    (c) a molybdenum-containing anti-oxidant and a phenolic anti-oxidant;    (d) a high overbased and a low overbased calcium sulfonate; and    (e) one or more additives selected from one or more dispersants different from those recited in (b), anti-oxidants different from those recited in (c), detergents different from those recited in (d), viscosity index improvers, ashless sulfur extreme pressure agents, alkaline earth metal and alkali metal borated extreme pressure agents, molybdenum-containing extreme pressure agents, pour point depressants, rust inhibitors, corrosion inhibitors, ash-containing friction modifiers, ashless friction modifiers, molybdenum-containing friction modifiers, metal deactivators, seal swell agents, demulsifiers and anti-foaming agents;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       35 . The lubricating oil composition of  claim 34 , wherein the sulfur content is in the range of 0.0 weight percent to about 0.09 weight percent based on the total weight of the lubricating oil composition.  
   
   
       36 . The lubricating oil composition of  claim 35 , wherein the sulfur content is in the range of 0.01 weight percent to about 0.07 weight percent based on the total weight of the lubricating oil composition.  
   
   
       37 . The lubricating oil composition of  claim 36 , wherein the sulfur content is in the range of 0.02 weight percent to about 0.05 weight percent based on the total weight of the lubricating oil.  
   
   
       38 . The lubricating oil composition of  claim 34 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.03 weight percent based on the total weight of the lubricating oil composition.  
   
   
       39 . The lubricating oil composition of  claim 38 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.02 weight percent based on the total weight of the lubricating oil composition.  
   
   
       40 . The lubricating oil composition of  claim 39 , wherein the phosphorus content is in the range of 0.0 weight percent to about 0.01 weight percent based on the total weight of the lubricating oil composition.  
   
   
       41 . The lubricating oil composition of  claim 40 , wherein the phosphorus content is 0.0 weight percent based on the total weight of the lubricating oil composition.  
   
   
       42 . The lubricating oil composition of  claim 34 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylate or an overbased metal carboxylate.  
   
   
       43 . A low sulfur and low phosphorus lubricating oil concentrate comprising: 
 (a) from about 10 weight percent to about 90 weight percent an oil of lubricating viscosity based on the total weight of the lubricating oil concentrate;    (b) a borated dispersant and a non-borated dispersant;    (c) a molybdenum-containing anti-oxidant and a phenolic anti-oxidant; and    (d) a high overbased and a low overbased calcium sulfonate; wherein the lubricating oil concentrate is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil concentrate does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       44 . The lubricating oil concentrate of  claim 43 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylate or an overbased metal carboxylate.  
   
   
       45 . A low sulfur and low phosphorus lubricating oil concentrate consisting essentially of: 
 (a) from about 10 weight percent to about 90 weight percent an oil of lubricating viscosity based on the total weight of the lubricating oil concentrate;    (b) a borated dispersant and a non-borated dispersant;    (c) a molybdenum-containing anti-oxidant and a phenolic anti-oxidant;    (d) a high overbased and a low overbased calcium sulfonate; and    (e) one or more additives selected from one or more dispersants different from those recited in (b), anti-oxidants different from those recited in (c), detergents different from those recited in (d), viscosity index improvers, ashless sulfur extreme pressure agents, alkaline earth metal and alkali metal borated extreme pressure agents, molybdenum-containing extreme pressure agents, pour point depressants, rust inhibitors, corrosion inhibitors, ash-containing friction modifiers, ashless friction modifiers, molybdenum-containing friction modifiers, metal deactivators, seal swell agents, demulsifiers and anti-foaming agents;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       46 . The lubricating oil concentrate of  claim 45 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylates or an overbased metal carboxylate.  
   
   
       47 . A method for lubricating internal combustion engines, which comprises lubricating the engine with a low sulfur and low phosphorus lubricating oil composition comprising: 
 (a) a major amount of an oil of lubricating viscosity;    (b) a borated dispersant and a non-borated dispersant;    (c) a molybdenum-containing anti-oxidant and a phenolic anti-oxidant; and    (d) a high overbased and a low overbased calcium sulfonate;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain aromatics compounds containing amino substituents and tri-nuclear molybdenum compounds.    
   
   
       48 . The method of  claim 47 , wherein the internal combustion engines are diesel engines, gasoline engines and natural gas engines.  
   
   
       49 . The lubricating oil concentrate of  claim 47 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylate or an overbased metal carboxylate.  
   
   
       50 . A method for lubricating internal combustion engines, which comprises lubricating the engine with a low sulfur and low phosphorus lubricating oil composition consisting essentially of: 
 (a) a major amount of an oil of lubricating viscosity;    (b) a borated dispersant and a non-borated dispersant;    (c) a molybdenum-containing antioxidant and a phenolic anti-oxidant;    (d) a high overbased and a low overbased calcium sulfonate; and    (e) one or more additives selected from one or more dispersants different from those recited in (b), anti-oxidants different from those recited in (c), detergents different from those recited in (d), viscosity index improvers, ashless sulfur extreme pressure agents, alkaline earth metal and alkali metal borated extreme pressure agents, molybdenum-containing extreme pressure agents, pour point depressants, rust inhibitors, corrosion inhibitors, ash-containing friction modifiers, ashless friction modifiers, molybdenum-containing friction modifiers, metal deactivators, seal swell agents, demulsifiers and anti-foaming agents;    wherein the lubricating oil composition is essentially free of zinc di-alkyl di-thiophosphates and contains no more than 0.1 weight percent sulfur and provided the lubricating oil composition does not contain alkylated and non-alkylated aromatic amines and tri-nuclear molybdenum compounds.    
   
   
       51 . The method of  claim 50 , wherein the internal combustion engines are diesel engines, gasoline engines and natural gas engines.  
   
   
       52 . The method of  claim 51 , wherein the one or more detergents in (e) is not an overbased metal phenate of, an overbased metal salicylates or an overbased metal carboxylate.