Country-specific HS code exemptions

Automobile engine oil (automobile engine lubricant) Automobile engine oil,Country-specific HS code exemptions also known as automobile engine lubricant, is one of the necessary and important parts of automobile engines.It can reduce wear during high-speed operation, reduce fuel consumption, and prevent engine overheating and corrosion, which plays a key role. This article will introduce the principle, performance, type and maintenance of engine oil from many aspects. I. The principle of engine oil. The engine oil leans against the inside of the engine to form a membrane-like lubricating oil film, forming a separator, that is, the metal surface between the parts of the engine. When running at high speed, the oil can reduce the friction and wear of the metal surface. It provides all-round protection for the engine through various ways such as lubrication, heat dissipation, anti-rust, shock absorption and so on. II. Performance of engine oil 1. Lubrication performance: The main function of the oil is to lubricate, that is, it can reduce various frictions and resistance between engine mechanical parts, which has a crucial impact on the life of the engine. Two. Anti-rust performance: machineThere are various rust inhibitors in the oil, which can effectively avoid oxidation and corrosion of engine parts, thus improving the service life and reliability of the engine. 3. Removal of dust and fuel: Oil can remove dust particles inside the engine and harmful substances in fuel, which can provide a cleaner environment for the engine, thus improving the service life of the engine. Four. Heat dissipation performance: The oil can avoid excessive heat accumulation leading to engine overheating through heat dissipation, thus improving the safety of vehicle driving. III. Types of engine oil Types of engine oil are divided into three types: mineral oil, synthetic oil and semi-synthetic oil: 1. Mineral oil Mineral oil is refined from natural crude oil, which is relatively cheap and suitable for old cars or low-level models. However, its viscosity effect is not obvious enough, and it is extremely easy to deteriorate and oxidize.Two. Synthetic oil Synthetic oil is an engine oil synthesized by chemical reaction. Compared with mineral oil, it has better high temperature resistance and oxidation stability, so the maintenance oil can maintain the original wear resistance for a longer time. 3. Semi-synthetic oil and semi-synthetic engine oil is based on the technology of chemical synthesis and adopts the production method of partial artificial synthetic chemicals. Compared with fully synthetic oil and mineral oil, it balances the advantages of the two and can balance the cost-effectiveness. IV. Maintenance of engine oil 1. Under normal maintenance, under normal circumstances, the maintenance cycle of engine oil is between 5,000 and 10,000 kilometers. Factors such as the frequency of use, model and driving condition of the vehicle will affect the maintenance cycle. Two. If the oil is replaced in time for too long, the essence in the oil will be gradually consumed, which will lead to a decrease in the viscosity or oxidation and deterioration of the oil. At this time, it is necessary to replace the oil in time.3. What needs to be noted when cleaning the engine is that when replacing the oil, it is necessary to clean the accumulation and garbage in the engine at the same time, so as to avoid the polishing residue entering the engine cleaning oil seal, resulting in damage to the system. Summary: Oil plays a very important role in automobile engines. By maintaining oil, we can extend the service life of the engine and improve the performance and safety of the car. When buying engine oil, pay attention to the applicability, choose the appropriate oil type and maintenance cycle to achieve the best purpose of protecting the engine, and replace the oil in time to ensure that your car is running in a healthy state.

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