Low sulfur, low ash and low phosphorous lubricant additive and composition

Abstract

A lubricating oil composition is disclosed. This composition, comprises a lubricating oil basestock, an alkylated aromatic additive of at least 0.01 and less than 20 weight percent of the composition, a dispersant-detergent-inhibitor system of less than 15 percent weight percent of the composition, a zinc dithiophosphate additive of at least 0.1 weight percent of the composition and no more than 1.0 weight percent of the composition, the composition having less than 630 PPM phosphorus, less than 710 PPM zinc, less than 5,000 PPM sulfur, less than 8 TBN, less than 1.0 weight percent ash. In a second embodiment, an additive composition for lubricating oils is disclosed. In a third embodiment, a method of obtain a favorable lubricating properties is disclosed.

1 . A composition, comprising, 
 a. a lubricating oil basestock;    b. an alkylated aromatic additive of at least 0.01 and less than 20 weight percent of the composition;    c. a dispersant-detergent-inhibitor system of less than 15 weight percent of the composition;    d. a zinc dithiophosphate additive of at least 0.1 weight percent of the composition and no more than 1.0 weight percent of the composition    e. the composition having less than 630 PPM phosphorus, less than 710 PPM zinc, less than 5,000 PPM sulfur, less than 8 TBN and less than 1.0 weight percent ash.    
   
   
       2 . The composition of  claim 1  further comprising a molybdenum additive wherein the molybdenum additive is less than 2 weight percent of the composition.  
   
   
       3 . The composition of  claim 1  further comprising a boron additive wherein the boron additive is less than 8 weight percent of the composition.  
   
   
       4 . The composition of  claim 1  further comprising a sulfur additive.  
   
   
       5 . The composition of  claim 1  wherein the composition has a viscosity less than 20 cSt at 400° C., fully saturated structures with an iodine value less than 1 and a volatility less than 15 weight percent loss in Noack.  
   
   
       6 . The composition of  claim 1  wherein the alkylated aromatic concentration is at least 0.5 weight percent and no more than 8 weight percent of the composition.  
   
   
       7 . The composition of  claim 1  further comprising additives to provide favorable lubricant performance wherein the additives are chosen form the group comprising zinc dithiophosphates, borated or non-borated dispersants, phenolic and aminic ashless anti-oxidants, metal detergents, molybdenum or organic friction modifiers, defoamants, seal swell additives, pour point depressants and others including contemporary dispersant-detergent-inhibitor (DDI) additive packages, and any combination thereof.  
   
   
       8 . The composition of  claim 1  wherein the base stock is chosen from the group consisting of group II base stocks, group III base stocks, group IV base stocks, and group V base stocks, gas-to-liquids base stocks, and any combination thereof.  
   
   
       9 . The composition of  claim 1  wherein the dispersant systems comprises additives chosen from the group consisting of borated and non-borated succinimides, succinic acid-esters and amides, alkylphenol-polyamine coupled Mannich adducts, and any combination thereof.  
   
   
       10 . The composition of  claim 1  wherein the alkylated aromatic additive is a mano-alkylate comprising a carbon and oxygen atomic ratio of at least 10:1 and less than 400:1.  
   
   
       11 . The composition of  claim 1  wherein the alkylated aromatic additive is an alkylated diphenyl sulfide.  
   
   
       12 . The composition of  claim 1  further comprising an ashless antioxidant additive.  
   
   
       13 . The composition of  claim 1  further comprising a sulfur free metal detergent.  
   
   
       14 . The composition of  claim 11  further comprising an aliphatic sulfur additive.  
   
   
       15 . A lubricant additive system for a lubricant composition, comprising: 
 a. an alkylated aromatic additive of less than 20 weight percent of the lubricant composition;    b. a sulfur-free detergent-dispersant system of less than 15 percent weight percent of the lubricant composition;    c. a zinc dithiophosphate additive of at least 0.1 weight percent of the composition and no more than 1.0 weight percent of the lubricant composition;    d. an alkylated diphenyl sulfide additive    
   
   
       16 . The lubricant additive of  claim 15  wherein the total lubricant additive treat is in the range of at least 0.01 weight percent and less than 25 weight percent of the lubricant composition.  
   
   
       17 . The lubricant additive of  claim 15  further a molybdenum additive.  
   
   
       18 . The lubricant additive of  claim 15  wherein the molybdenum additive is an organic molybdenum additive.  
   
   
       19 . The lubricant additive of  claim 17  further comprising a non volatile sulfur additive.  
   
   
       20 . A method comprising 
 a. obtaining a composition comprising a lubricating oil basestock, an alkylated aromatic additive of at least 0.01 and less than 20 weight percent of the composition, a dispersant-detergent-inhibitor system of less than 15 percent weight percent of the composition, zinc dithiophosphate additive of at least 0.1 weight percent of the composition and no more than 1.0 weight percent of the composition, wherein the composition has less than 630 PPM phosphorus, less than 710 PPM zinc, less than 5,000 PPM sulfur, less than 8 TBN, less than 1.0 weight percent ash;    b. lubricating an engine with the composition to achieve favorable anti-wear properties, oxidation resistance and cleanliness.    
   
   
       21 . A method for reducing sulfur in exhaust gasses in an internal combustion engine, comprising: 
 a. obtaining a composition comprising a lubricating oil base stock, an alkylated aromatic additive of at least 0.01 and less than 20 weight percent of the composition, a dispersant-detergent-inhibitor system of less than 15 percent weight percent of the composition, zinc dithiophosphate additive of at least 0.1 weight percent of the composition and no more than 1.0 weight percent of the composition, wherein the composition has less than 630 PPM phosphorus, less than 710 PPM zinc, less than 5,000 PPM sulfur, less than 8 TBN, less than 1.0 weight percent ash;    b. lubricating the internal combustion engine with the composition.