ENGINE OIL COMPOSITION
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Abstract
A fuel-saving-type engine oil composition is provided that exhibits a satisfactory friction-reducing effect in a low-viscosity engine oil without being constrained by, for example, high temperatures, low temperatures, low loads, or high loads. The engine oil composition includes: an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades; and a molybdenum compound (A) represented by the following general formula (1):
where R1 to R4 each independently represent a hydrocarbon group having 4 to 18 carbon atoms, and not all of R1 to R4 represent the same group, and when R1 and R2 represent the same group, R3 and R4 do not represent the same group, and X1 to X4 each independently represent a sulfur atom or an oxygen atom.
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Citations
14 Claims
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1-9. -9. (canceled)
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10. An engine oil composition, comprising:
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an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades; and a molybdenum compound (A) represented by the following general formula (1); - View Dependent Claims (11, 12, 13)
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14. A method of reducing a coefficient of friction of an engine oil, comprising adding an additive for an engine oil containing a molybdenum compound (A) represented by the following general formula (1) to an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades:
Specification