JP2006328408A5 - - Google Patents

Description

The oil of lubricating viscosity of the present invention may comprise a Group I, Group II, Group III, Group IV or Group V base stock or a base oil blend of said base stock.
The oil of lubricating viscosity of the present invention preferably includes at least a portion of one or more Group IV base feedstocks. Suitably, the lubricating oil composition of the present invention comprises at least 25 wt%, preferably at least 35 wt%, more preferably at least 40 wt% Group IV base stock, based on the total weight of the composition. Suitably, the lubricating oil composition of the present invention is less than 85 wt%, preferably less than 75 wt%, more preferably less than 60 wt%, especially less than 55 wt% Group IV base, based on the total weight of the composition Contains raw oil.
The oil of lubricating viscosity of the present invention preferably comprises at least a portion of one or more Group III base feedstocks. Suitably, the lubricating oil composition of the present invention comprises at least 15 wt%, preferably at least 20 wt%, more preferably at least 25 wt% Group III base stock, based on the total weight of the composition. Suitably, the lubricating oil composition of the present invention comprises less than 80 wt%, preferably less than 60 wt%, most preferably less than 50 wt% Group III base stock, based on the total weight of the composition.
The lubricating composition of the present invention may comprise one or more Group V ester base feedstocks. Suitably, the lubricating composition comprises less than 25 wt.%, Preferably less than 10 wt.%, More preferably 5 wt.% Or less of the ester base stock based on the total weight of the composition. Suitably, the lubricating oil composition of the present invention comprises at least 1% by weight, preferably at least 1.5% by weight, more preferably at least 3% by weight of an ester base stock.
It should be noted that any of the above base stocks may be provided to the composition as a separate component for blending. Also, any or all of the base stock may be provided to the composition as a diluent for another component of the lubricating oil composition.
Friction modifiers lubricating oil composition be substantially free of less than 0.1 wt%, preferably less than 0.05 wt% (e.g., 0 to 0.4 wt%) or less than 0.04 wt%, preferably less than 0.01 wt% It should be noted that it is defined herein to mean including, for example, 0-0.0075 wt%, most preferably no (0 wt%) friction modifier.

Claims (10)

A method for lubricating an internal combustion engine having a cam and a rotating tappet, comprising as a lubricant for the engine a phosphorus content in an amount of 50 to 900 ppm (mass basis), a sulfur content in an amount of 1500 to 3000 ppm (mass basis), 0.0 Has a boron content of ~ 100ppm and a sulfated ash content of no more than 1.0% by weight, and a friction of 0.0 to 0.1% by weight based on the weight of the base oil of lubricating viscosity, the weight of the fully formulated lubricating oil composition Modifiers and metal-containing or ash-forming detergents; ashless dispersants; boron compound-treated ashless dispersants; dihydrocarbyl dithiophosphate metal salts as antiwear and antioxidants; oxidation inhibitors or antioxidants; rust Or a corrosion inhibitor; a foam control agent; a viscosity stabilizer; a viscosity modifier; a pour point depressant; a lubricating composition containing one or more additives selected from supplemental antiwear agents. Lubrication method.   The method of claim 1, wherein the lubricating oil composition comprises less than 0.05 wt% friction modifier based on the weight of the fully formulated oil composition.   The method according to claim 1 or 2, wherein the friction modifier in the lubricating composition is selected from one or more of the following substances: glycerol esters of fatty acids; nitrogen-containing friction modifiers; and molybdenum compounds.   The method according to any one of claims 1 to 3, wherein a sulfated ash content of the lubricating oil composition is less than 0.7 mass%.   The method according to any one of claims 1 to 4, wherein the phosphorus content of the lubricating oil composition is 0.06% by mass or less based on the mass of the completely formulated composition.   The method according to any one of claims 1 to 5, wherein the boron content of the composition is less than 90 ppm (mass basis). 7. The lubricating oil composition according to any one of claims 1 to 6 , wherein the lubricating oil composition comprises one or more nitrogen-containing dispersants, and the one or more dispersants may optionally provide 0.005 to 0.08 mass% nitrogen to the composition. the method of. Phosphorus content in an amount of 50-900 ppm (mass basis), sulfur content in an amount of 1500-3000 ppm (mass basis), boron content in an amount of 0.0-0.1 mass%, and sulfated ash content in an amount not exceeding 1.0 mass% the a, base oil of lubricating viscosity, fully formulated lubricating oil composition 0.0 to 0.1 mass% mass as a measure of the amount of friction modifiers, and metal-containing detergent or ash forming detergents; ashless dispersant; boron compound treatment Mu Dihydrocarbyl dithiophosphate metal salts as antiwear agents and antioxidants; oxidation inhibitors or antioxidants; rust or corrosion inhibitors; foam control agents; viscosity stabilizers; viscosity modifiers; agent; including recruitment antiwear one or more additives selected from, an internal combustion engine lubricating composition comprising a rotating tappet. Use of a lubricating oil composition to pass a 650 hour Volkswagen RNA test (PV1473 draft) for cam and tappet wear , wherein the lubricating oil composition is as specified in claim 1 and optionally claimed. Use of a lubricating oil composition having the characteristics of any one of 2 to 7 . Use of the composition of claim 9 to pass both the 650 hour VW RNT test (PV1473 draft) for cam and tappet wear and the VW PV1451 test for fuel economy .