Low sulfur, low ash, low and phosphorus lubricant additive package using overbased calcium oleate

Abstract

The present invention provides a low sulfur, low ash, and low phosphorus oil soluble lubricant additive package comprising an overbased metal carboxylate. Also included in the present invention are lubricating oils comprising the inventive oil soluble lubricant additive package, as well as machines lubricated by such oils. Several methods for lubricating machinery are also disclosed.

What is claimed is:  
     
         1 . An oil soluble lubricant additive package comprising: 
 at least one overbased metal carboxylate having a total base number of from about 120 to about 360; and    at least one detergent, wherein the weight ratio of said overbased metal carboxylate to said detergent is from about 1:1 to about 3:1.    
     
     
         2 . The oil soluble lubricant additive package as in  claim 1 , wherein said oil soluble lubricant additive package has a sulfur content and a phosphorus content sufficient to yield a lubricating oil having a sulfur content less than about 0.3 wt % and a phosphorus content of less than about 0.11 wt %.  
     
     
         3 . The oil soluble lubricant additive package as in  claim 1 , wherein at least one of said at least one overbased metal carboxylate is an overbased metal oleate.  
     
     
         4 . The oil soluble lubricant additive package as in  claim 3 , wherein said overbased metal oleate is selected from the group consisting of: overbased calcium oleate and overbased magnesium oleate.  
     
     
         5 . The oil soluble lubricating additive package as in  claim 1 , wherein at least one of said at least one detergent is selected from the group consisting of calcium sulfonate, magnesium sulfonate, sodium sulfonate, non-sulfurized phenates, sulfurized phenates, salicylates, overbased saligenin, and combinations thereof.  
     
     
         6 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 1 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         7 . A machine lubricated by the lubricating oil of  claim 6 .  
     
     
         8 . The machine lubricated by the lubricating oil of  claim 7 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         9 . A vehicle comprising the oil soluble lubricant additive package of  claim 1 .  
     
     
         10 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 1 .    
     
     
         11 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 1 .    
     
     
         12 . The method for lubricating moving parts of a machine as in  claim 11 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         13 . An oil soluble lubricant additive package comprising: 
 an overbased metal carboxylate having a total base number of from about 120 to about 360; and    at least one dispersant, wherein the weight ratio of said overbased metal oleate to said dispersant is from about 1:4 to about 1:12.    
     
     
         14 . The oil soluble lubricant additive package as in  claim 13 , wherein said oil soluble lubricant additive package has a sulfur content and a phosphorus content sufficient to yield a lubricating oil having a sulfur content less than about 0.3 wt % and a phosphorus content of less than about 0.11 wt %.  
     
     
         15 . The oil soluble lubricant additive package as in  claim 13 , wherein said at least one overbased metal carboxylate is an overbased metal oleate.  
     
     
         16 . The oil soluble lubricant additive package as in  claim 15 , wherein said overbased metal oleate is selected from the group consisting of: overbased calcium oleate and overbased magnesium oleate.  
     
     
         17 . The oil soluble lubricant additive package as in  claim 13  wherein said at least one dispersant has a molecular weight of from about 1000 to about 6000.  
     
     
         18 . The oil soluble lubricant additive package as in  claim 13  wherein said at least one dispersant is a maleic anhydride functionalized polyisobutylene polymer that has been reacted with a polyamine.  
     
     
         19 . The oil soluble lubricant additive package as in  claim 13  wherein said at least one dispersant is a product of a Mannich reaction.  
     
     
         20 . The oil soluble lubricant additive package as in  claim 13  where in said at least one dispersant is an ethylene-propylene type dispersant.  
     
     
         21 . The oil soluble lubricant additive package as in  claim 13  additionally comprising at least one component selected from the group consisting of: viscosity index improvers and pour point depressants.  
     
     
         22 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 13 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         23 . A machine lubricated by a lubricating oil comprising the additive package of  claim 13 .  
     
     
         24 . The machine of  claim 23 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         25 . A vehicle comprising the oil soluble lubricant additive package of  claim 13 .  
     
     
         26 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 13 .    
     
     
         27 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 13 .    
     
     
         28 . The method for lubricating moving parts of a machine as in  claim 27 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         29 . An oil soluble lubricating additive package comprising: 
 an overbased metal carboxylate having a total base number of from about 120 to about 360; and    at least one antioxidant, wherein the weight ratio of overbased metal carboxylate to antioxidant is from about 10:1 to about 1:3.    
     
     
         30 . The oil soluble lubricant additive package as in  claim 29 , wherein said oil soluble lubricant additive package has a sulfur content and a phosphorus content sufficient to yield a lubricating oil having a sulfur content less than about 0.3 wt % and a phosphorus content of less than about 0.11 wt %.  
     
     
         31 . The oil soluble lubricant additive package as in  claim 29 , wherein said overbased metal carboxylate is an overbased metal oleate.  
     
     
         32 . The oil soluble lubricant additive package as in  claim 31  wherein said overbased metal oleate is selected from the group consisting of: overbased calcium oleate and overbased magnesium oleate.  
     
     
         33 . The oil soluble lubricant additive package as in  claim 29  wherein at least one of said at least one antioxidant is selected from the group consisting of: zinc dithiophosphates, alkylated diphenylamines, sulfurized olefins, phenols, hindered phenols, and sulfurized phenols.  
     
     
         34 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 29 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         35 . A machine lubricated by a lubricating oil comprising the additive package of  claim 29 .  
     
     
         36 . The machine of  claim 35 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         37 . A vehicle comprising the oil soluble lubricant additive package of  claim 29 .  
     
     
         38 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 29 .    
     
     
         39 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 29 .    
     
     
         40 . The method for lubricating moving parts of a machine as in  claim 39 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         41 . An oil soluble lubricant additive package comprising: 
 an overbased calcium oleate having a total base number of at least 120; and    at least one component selected from the group consisting of: detergents, dispersants, antioxidants, friction modifiers, viscosity index improvers, and pour point depressants.    
     
     
         42 . The oil soluble lubricant additive package as in  claim 41 , wherein said oil soluble lubricant additive package has at least one property selected from the group consisting of: a sulfur content less than about 6 wt % and a phosphorus content less than about 1.2 wt %.  
     
     
         43 . The oil soluble lubricant additive package as in  claim 41  wherein said oil soluble lubricant additive package is essentially free of non-sulfurized phenate.  
     
     
         44 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 41 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         45 . A machine lubricated by a lubricating oil comprising the additive package of  claim 41 .  
     
     
         46 . The machine of  claim 45 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         47 . A vehicle comprising the oil soluble lubricating additive package of  claim 41 .  
     
     
         48 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 41 .    
     
     
         49 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 41 .    
     
     
         50 . The method for lubricating moving parts of a machine as in  claim 49 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         51 . A method of achieving a low sulfur, low ash, and low phosphate oil formulation, said method comprising: 
 providing an oil soluble lubricant additive package, said oil soluble lubricant additive package comprising an overbased metal carboxylate having a total base number of from about 120 to about 360; and    admixing said oil soluble lubricant additive package with at least a base oil so as to form a lubricating oil having a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.    
     
     
         52 . The method of achieving a low sulfur, low ash, and low phosphorus oil formulation as in  claim 51 , wherein said overbased metal carboxylate is selected from the group consisting of: overbased calcium oleate and overbased magnesium oleate.  
     
     
         53 . The method of achieving a low sulfur, low ash, and low phosphorus oil formulation as in  claim 51  wherein said oil soluble lubricant additive package additionally comprises at least one additive selected from the group consisting of: detergents, dispersants, antioxidants, friction modifiers, viscosity index improvers, and pour point depressants.