Engine oil composition

Abstract

The invention relates to an engine oil composition, which takes the total weight of the engine oil composition as the reference. The engine oil composition is prepared from the following components in percentage by weight: 0.1 to 0.4 percent of a pour point depressant, 1.5 to 8.0 percent of a viscosity index improver, 1.79 to 3.93 percent of a clearing agent, 0.64 to 3.07 percent of a dispersing agent, 1.04 to 3.67 percent of an antioxidant, 0.01 to 5 percent of a friction reducing agent, 0.3 to 1.5 percent of zinc dialkyl dithiophosphate and the balance of neutral base oil, the pour point depressant comprises a vinyl acetate-fumarate pour point depressant; the vinyl acetate-fumarate pour point depressant is prepared from the following components in parts by weight: 0.4 to 0.6 part of octadecyl fumarate, 0.8 to 1.2 parts of dodecanol fumarate, 0.8 to 1.2 parts of tetradecyl fumarate, 0.8 to 1.2 parts of hexadecyl fumarate and 0.8 to 1.2 parts of octadecyl fumarate. The engine oil composition has good emulsification retention ability, wear resistance and detergency and dispersibility.

Description

technical field [0001] The invention relates to the technical field of engine oil, in particular to an engine oil composition. Background technique [0002] The average working temperature of engine oil during engine operation is 80°C to 90°C, and the highest temperature can reach 150°C. When the engine stops running, due to the rapid drop in the operating temperature of the engine oil, it is inevitable that condensed water will be formed and mixed into the engine, especially in the alpine regions where the temperature drops more rapidly. The above phenomenon is more common. In addition, compared with gasoline and diesel fuel, alcohol fuel has a higher volatility and produces a large amount of water in combustion, so it is easier to mix ethanol / methanol and water in engine oil. Generally, the content of ethanol / methanol in non-aquatic engine equipment or alcohol fuel is less than 15%. The water and alcohol in the oil do not exceed 10%. Under this ratio, it is difficult to r...

AI Technical Summary

Problems solved by technology

The separation state of engine oil and water is under low temperature conditions. After the water layer freezes, on the one hand, the engine wear will be increased, and on the other hand, the low-temperature starting performance of the engine will be seriously affected.

Images