Low sap engine lubricant containing silane and zinc dithiophosphate lubricant additive and composition

Abstract

The present invention is directed to a lubricating oil composition comprising a lubricating oil basestock, an organic silane containing additive of at least 0.1 and less than 2.0 weight percent of the composition, a dispersant-detergent-inhibitor system of less than 15 weight percent of the composition, an organic boron additive of at least 0.1 and less than 8.0 weight percent of the composition, a zinc dithiophosphate additive of at least 0.1 weight percent of the composition and less than 1.6 weight percent of the composition and the composition having at least 80 PPM and less than 1600 RPM silicon, at least 100 PPM and less than 630 PPM phosphorus, at least 105 PPM and less than 710 PPM zinc, at least 1,000 PPM and less than 4,000 PPM sulfur, at least 800 PPM, less than 10,000 PPM ash and less than 450 PPM boron. 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 organic silane containing additive present in an amount of at least 0.1 and less than 2.0 weight percent of the composition;   c. a dispersant-detergent-inhibitor system of less than 15 weight percent of the composition;   d. an organic boron additive present in an amount of at least 0.1 and less than 8.0 weight percent of the composition;   e. a zinc dithiophosphate additive present in an amount of at least 0.1 weight percent of the composition and less than 1.6 weight percent of the composition; and   f. the composition having at least 80 PPM and less than 1600 PPM silicon, at least 100 PPM and less than 630 PPM phosphorus, at least 105 PPM and less than 710 PPM zinc, at least 1,000 PPM and less than 4,000 PPM sulfur, at least 800 PPM, less than 10,000 PPM ash and less than 450 PPM Boron.   
   
   
       2 . The composition of  claim 1  further comprising at least one performance wherein the additives are chosen form the group comprising 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, organic borates, contemporary dispersant-detergent-inhibitor (DDI) additive packages, and any combination thereof. 
   
   
       3 . 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. 
   
   
       4 . 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. 
   
   
       5 . The composition of  claim 1  further comprising an ashless antioxidant additive. 
   
   
       6 . The composition of  claim 1  further comprising a metallic detergent or detergent system. 
   
   
       7 . The composition of  claim 6  wherein the detergent system provides a total base number (TBN) less than 9, preferably less than 7 and most preferably less than 5, to the formulated lubricant composition. 
   
   
       8 . The composition of  claim 1  further comprising a viscosity modifier additive. 
   
   
       9 . The composition of  claim 1  wherein the organic borate is a borated hydroxyl esters chosen from the group consisting of borated glycerol mono-oleate, borated glycerol di-oleate, borated glycerol tri-oleate, borated glycerol mono-cocoate, borated mono-talloate, borated glycerol mono-sorbitate, borated polyol esters and any combination thereof. 
   
   
       10 . The composition of  claim 1  further comprising a non-corrosive organic sulfur additive. 
   
   
       11 . The composition of  claim 10  wherein the non-corrosive sulfur additive is chosen from the group consisting of ashless derivatives of thiadiazoles, ashless derivatives of benzothiazoles, ashless alkyl, aryl sulfides/di-sulfides/tri-sulfide including thianthrene, diphenyl disulfide, dinonyl disulfide, dipyridyl disulfide, and their alkylates, ashless dithiocarbamates, thioetsers/sulfurized esters, thioglycolates, dialkyl thiodipropionates, dialkyl dithiopropionates, and any combination thereof. 
   
   
       12 . A lubricant additive system for a lubricant composition, comprising:
 a. an organic silane containing additive of at least 0.4 and less than 8.0 weight percent of the additive;   b. a dispersant-detergent-inhibitor system of less than 60 weight percent of the additive;   c. an organic boron additive of at least 0.4 and less than 32.0 weight percent of the additive; and   d. a zinc dithiophosphate additive of at least 0.4 weight percent of the composition and less than 6.4 weight percent of the additive.   
   
   
       13 . The lubricant additive of  claim 12  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. 
   
   
       14 . The lubricant additive of  claim 12  further comprising a non-corrosive sulfur additive. 
   
   
       15 . The lubricant additive of  claim 12  further comprising an ashless antioxidant. 
   
   
       16 . A method comprising:
 a. obtaining a composition comprising a lubricating oil basestock, an organic silane containing additive of at least 0.1 and less than 2.0 weight percent of the composition, a dispersant-detergent-inhibitor system of less than 15 weight percent of the composition, an organic boron additive of at least 0.1 and less than 8.0 weight percent of the composition, a zinc dithiophosphate additive of at least 0.1 weight percent of the composition and less than 1.6 weight percent of the composition and the composition having at least 80 PPM and less than 1600 PPM silicon, at least 100 PPM and less than 630 PPM phosphorus, at least 105 PPM and less than 710 PPM zinc, at least 1,000 PPM and less than 4,000 PPM sulfur, at least 800 PPM, less than 10,000 PPM ash and less than 450 PPM Boron; and   b. lubricating an engine with the composition to achieve favorable oxidation.   
   
   
       17 . A method for reducing sulfur, phosphorus and ash in a lubricating oil for an internal combustion engine, comprising:
 a. obtaining a composition comprising a lubricating oil basestock, an organic silane containing additive present in the amount of of at least 0.1 and less than 2.0 weight percent of the composition, a dispersant-detergent-inhibitor system of less than 15 weight percent of the composition, an organic boron additive present in the amount of at least 0.1 and less than 8.0 weight percent of the composition, a zinc dithiophosphate additive present in the amount of at least 0.1 weight percent of the composition to 1.6 weight percent of the composition and the composition having at least 100 PPM and less than 630 PPM phosphorus, at least 105 PPM and less than 710 PPM zinc, at least 1,000 PPM and less than 4,000 PPM sulfur, at least 800 PPM, less than 10,000, and;   b. lubricating the internal combustion engine with the composition.