Lubricating oil composition
First Claim
1. A lubricating oil composition which exhibits improved low temperature anti-wear performance, improved fuel economy and fuel economy retention properties, said composition comprising:
- a) an oil of lubricating viscosity having a viscosity index of at least 95;
b) at least one calcium detergent;
c) at least one oil soluble molybdenum compound;
d) at least one nitrogen containing friction modifier; and
e) at least one zinc dihydrocarbyldithiophosphate compound, wherein said composition has a NOACK volatility of about 15.5 wt. % or less, from about 0.058 to 0.58 wt. % calcium from the calcium detergent, molybdenum in an amount up to about 350 ppm from the molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from the zinc dihydrocarbyldithiophosphate compound.
3 Assignments
0 Petitions
Accused Products
Abstract
A lubricating oil composition exhibiting improved low temperature anti-wear performance and improved fuel economy and fuel economy retention properties, which comprises: (a) an oil of lubricating viscosity; (b) at least one calcium detergent; (c) at least one oil soluble molybdenum compound; (d) at least one nitrogen containing friction modifier; and (e) at least one zinc dihydrocarbyldithiophosphate compound, wherein the composition has a NOACK volatility of about 15.5 wt. % or less and contains from about 0.058 to 0.58 wt. % calcium from the calcium detergent, molybdenum in an amount up to about 350 ppm from a molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from a zinc dihydrocarbyldithiophosphate compound.
-
Citations
18 Claims
-
1. A lubricating oil composition which exhibits improved low temperature anti-wear performance, improved fuel economy and fuel economy retention properties, said composition comprising:
-
a) an oil of lubricating viscosity having a viscosity index of at least 95;
b) at least one calcium detergent;
c) at least one oil soluble molybdenum compound;
d) at least one nitrogen containing friction modifier; and
e) at least one zinc dihydrocarbyldithiophosphate compound, wherein said composition has a NOACK volatility of about 15.5 wt. % or less, from about 0.058 to 0.58 wt. % calcium from the calcium detergent, molybdenum in an amount up to about 350 ppm from the molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from the zinc dihydrocarbyldithiophosphate compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for improving the anti-wear protection of an internal combustion engine comprising the steps of:
- (1) adding a lubricating oil composition which exhibits improved fuel economy and fuel economy retention properties to an engine, said composition comprising;
(a) an oil of lubricating viscosity;
(b) at least one calcium detergent;
(c) at least one oil soluble molybdenum compound;
(d) at least one nitrogen containing friction modifier; and
(e) at least one zinc dihydrocarbyldithiophosphate compound, wherein said composition has a NOACK volatility of about 15.5 wt. % or less, from about 0.058 to 0.58 wt. % calcium from the calcium detergent, molybdenum in an amount up to about 350 ppm from the molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from the zinc dihydrocarbyldithiophosphate compound; and
(2) operating the engine, thereby obtaining an average cam lobe wear of less than 100 microns as measured by the ASTM Sequence IVA Test.
- (1) adding a lubricating oil composition which exhibits improved fuel economy and fuel economy retention properties to an engine, said composition comprising;
-
18. A concentrate for blending with an oil of lubricating viscosity, said concentrate comprising:
-
(a) at least one calcium detergent;
(b) at least one oil soluble molybdenum compound;
(c) at least one nitrogen containing friction modifier; and
(d) at least one zinc dihydrocarbyldithiophosphate compound, to provide a lubricating oil composition having a NOACK volatility of about 15.5 wt. % or less, from about 0.058 to 0.58 wt. % calcium from the calcium detergent, molybdenum in an amount up to about 350 ppm from the molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from the zinc dihydrocarbyldithiophosphate compound.
-
Specification