Long-life fuel-saving engine oil composition

A technology of composition and engine oil, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of disappearance, deterioration of MoDTC, deterioration of fuel saving effect, etc., and achieve good mileage, reduce fuel consumption, and excellent high temperature. Effects of Oxidative Stability

CN101218330BActive Publication Date: 2011-03-30JAPAN ENERGY CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2011-03-30

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Abstract

A long-life fuel-saving engine oil composition which comprises a mineral and / or synthetic base oil; an amine antioxidant and a phenolic antioxidant added to the oil in a total amount of 1.2 mass% or larger in which the ratio of the mass amount of nitrogen (N) contained in the amine antioxidant to the mass amount of oxygen (O) contained in the phenolic antioxidant, (N / O), is 0.20-0.50; and MoDTC incorporated in an amount of 0.055 mass% or larger in terms of molybdenum amount. The long-life fuel-saving engine oil composition has excellent oxidative stability at high temperatures and retains low-frictional properties over long.
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Description

technical field

[0001] The present invention relates to long-life, fuel-efficient motor oil compositions having excellent high-temperature oxidation stability and maintaining low-friction properties for extended periods of time. Background technique

[0002] In recent years, people have focused on improving the fuel mileage of vehicles and suppressing CO 2 emissions to prevent global warming are increasingly demanding. In order to increase the fuel efficiency of a vehicle, it is important to increase the efficiency of the engine. Therefore, people have applied lean-burn technology (lean-burn technology) and direct-injection technology to gasoline engines. On the other hand, since fuel consumption can be reduced by reducing the friction of the engine, attempts have been made to use low-friction materials for sliding parts and also use fuel-saving engine oil.

[0003] In order to prepare fuel-efficient motor oils, it is known to effectively reduce the viscosity of the motor...

Examples

Embodiment

[0043] The present invention will be described below by way of examples.

[0044] The following was used as the base oil: Mineral base oil (kinematic viscosity: 20.3 mm 2 / sec (40°C), 4.34mm 2 / sec (100°C); viscosity index: 124).

[0045] The phenolic antioxidant A, amine antioxidant B, MoDTC and other additives described below were mixed into the base oil at the ratio shown in Table 1 to prepare the engine oils of Example 1 and Comparative Examples 1-3. Table 1 also shows the ratio of the nitrogen content (N) of the amine antioxidant to the oxygen content (O) of the phenolic antioxidant (mass ratio: N / O) and the Mo content. The additional additive is an additive mixture comprising zinc alkyl dithiophosphates (ZnDTP), calcium sulfonate, alkenyl succinimide, viscosity index improver, pour point depressant and antifoam. In Examples and Comparative Examples, the additives were added in equal amounts.

[0046] Use the phenolic antioxidant represented by general formula (2) (wh...