Engine oil additive and engine oil composition for small gasoline engine

Abstract

The invention relates to an engine oil additive for a small gasoline engine. The engine oil additive is prepared from the following components in parts by weight: 0.1-10 parts of a composite detergent, 0.1-4 parts of an ashless dispersant, 0.1-2.5 parts of an oxidation and corrosion inhibitor, 0.05-1.0 part of an antioxidant, 0.001-1.5 parts of an organic molybdenum additive and 0.001-0.01 parts of an anti-foaming agent, wherein the composite detergent is prepared from two or three of sulfonate, salicylate and sulfurized alkylphenol salt by mixing. The invention further relates to engine oil composition containing the additive. The provided additive and composition have good high-temperature detergency, oil sludge dispersity and oxidation resistance, low generation probability of high-temperature deposit, small evaporation loss and lower oil consumption, can slow down the formation trend of engine oil deposit of the small gasoline engine, and enables engine oil sludge formed at low temperature to be suspended in engine oil, so that starting abrasion is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of lubricating oil additives, in particular to a lubricating oil additive for small gasoline engines. Background technique [0002] After entering the 21st century, the domestic and export sales of small gasoline engines have grown rapidly. After some motorcycle manufacturers have self-developed engine capabilities, they have begun to diversify their product development. For example, Jialing Honda has transformed into the production of general-purpose motorcycles. Small gasoline engines are mainly used. Qianjiang Motorcycle Group also established Zhejiang Zhengfeng Power Co., Ltd., which was put into operation in Wenling High-tech Development Zone. Jiangsu Linhai is the largest manufacturer of general-purpose small gasoline engines in China. Therefore, it is of positive significance to develop special oil products matched with small gasoline engines and increase the added value of sales in the market. [00...

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Problems solved by technology

The current problem is that the volume of oil used for this type of product is small, generally between 200ml and 400ml, and the quality level is not high. Imported and domestic compounding agents, sulfate ash and high-temperature deposits meet the requirements, and the quality level is higher. , if this type of compounding agent is used, the performance and price ratio of the production product does not have an advantage, and at the same time, the requirements for the evaporation loss of the product are high, and a base oil that meets the requirements for evaporation loss is required

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