Lubricating composition

Abstract

A lubricating oil composition that includes a base oil comprising a Fischer-Tropsch derived base oil and an anti-corrosive compound. The anti-corrosive compound can be present in an amount between 0.001 and 8% by weight, preferably between 1 and 5% by weight.

1 . A lubricating oil composition comprising:
 (a) a base oil comprising a Fischer-Tropsch derived base oil; and   (b) an anti-corrosive compound.   
     
     
         2 . The lubricating oil composition according to  claim 1 , wherein the anti-corrosive compound is present in an amount of between 0.01 and 8% by weight of the lubricant composition. 
     
     
         3 . The lubricating oil composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of thiazoles, triazoles, benzodiazoles, benzotriazoles, and thiodiazoles. 
     
     
         4 . The lubricating oil composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of sodium sulfonates, barium sulfonate, neutral barium dinonylnaphthalene sulfonate (also calcium and zinc), and overbased sulfonates. 
     
     
         5 . The lubricating oil composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of zinc diamyldithiocarbamate and zinc dithiocarbamates. 
     
     
         6 . The lubricating oil composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of hexamine, phenylenediamine, dimethylethanolamine, and derivatives thereof. 
     
     
         7 . The lubricating oil composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of phosphate esters, borate esters and polyethers. 
     
     
         8 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of ethoxylated phenols, substituted succinic acids, fatty carboxylic acids, carboxylic acid derivatives, and fatty amines such as alkyl imidazoline. 
     
     
         9 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of thiophosphates, phosphoric acid derivatives, and zinc dithiophosphates. 
     
     
         10 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of zinc naphthenate and bismuth naphthenate. 
     
     
         11 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is selected from mercapto-thiadiazole derivatives. 
     
     
         12 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is a sarcosine. 
     
     
         13 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of salts of carboxylic acid and alkanolamine, amine phosphate, and fatty acid alkanolamines. 
     
     
         14 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is selected from the group consisting of triethanolamine salts of phosphate esters. 
     
     
         15 . The lubricating composition according to  claim 1 , wherein the anti-corrosive compound is an oil soluble complex chelating agent. 
     
     
         16 . A lubricating oil composition according to  claim 1  wherein the Fischer-Tropsch derived base oil has a kinematic viscosity at 100° C. of from 1 mm 2 /s to 35 mm 2 /s. 
     
     
         17 . A lubricating oil composition according to  claim 1  wherein the base oil contains more than 50 wt. %, preferably more than 60 wt. %, more preferably more than 70 wt. %, even more preferably more than 80 wt. %, most preferably more than 90 wt. % Fischer-Tropsch derived base oil. 
     
     
         18 . A method for lubricating an engine, the method comprising lubricating said engine with the oil composition of  claim 1 , wherein the step of lubricating the engine results in a reduction in the amount of copper corrosion. 
     
     
         19 . The method of  claim 18 , wherein the engine is a passenger car engine. 
     
     
         20 . The method of  claim 18 , wherein the engine is a heavy duty diesel engine.