Lubricating oil is a kind of liquid or solid lubricant used in various types of vehicles and mechanical equipment to reduce friction and protect machinery and processing parts. It mainly plays the role of lubrication, cooling, rust prevention, cleaning, sealing and buffering. The normal operation of the engine is inseparable from the lubrication of engine oil. A variety of additives contained in the lubricating oil can effectively protect the important moving parts of the engine.

　　At present, a variety of lubricants are mixed up in the market, so many car owners do not know which lubricants they really need to buy to meet their car needs.

　　How to choose lubricating oil:

　　First of all, you need to know whether your car is naturally aspirated or turbocharged. Naturally aspirated vehicles and turbocharged vehicles are also very particular about the selection of lubricants. Naturally aspirated vehicles have lower requirements for lubricating oil. Generally, refined mineral oil or better semi synthetic oil can be selected. Fully synthetic engine oil must be selected for turbocharged vehicles. The oil temperature of naturally aspirated vehicle is usually within 100, and 30 (oil film thickness) standard oil is enough to protect the engine. Turbocharged cars have high calorific value, so it is easy to break through the oil temperature above 100. Generally 40 standard or above fully synthetic oil is required.

　　Change of lubricating oil:

　　Generally speaking, most vehicles should change oil when they reach the specified mileage of oil change at 5000 km, but this mileage is not inevitable. In fact, due to different engine conditions, oil used and service environment, the reasonable oil change cycle of each vehicle should also have certain differences, which can not be generalized. The owner should determine the oil change cycle according to the actual driving conditions, road conditions, vehicle conditions and oil quality. Even for new cars, the oil change cycle can be extended appropriately. However, it should not exceed 7500km. No matter how good the engine oil is, its chemical properties will change after a certain mileage.

　　Finally, all kinds of oils have their own characteristics. They are not perfect, but they don't know what suits them or gradually improve them. You can know the importance of oil to the car. If you use good oil for small displacement cars, the car can give more play to its power. It's smooth and smooth. What it brings is the pleasure of driving, which can't be matched by ordinary oil.