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List of catalogs in this article:

• 1 、 What are the functions of automobile lubricants?
• 3, What is the classification of automotive lubricants?
• 4、 How often should car lubricants be changed

What are the markings of car lubricants?

Generally speaking, the label on the lubricating oil is the oil viscosity classification method adopted by the American Society of Automotive Engineers (SAE). This is a viscosity grade classification method, which divides lubricating oil into high-temperature type for summer, low-temperature type for winter, and all-weather type for winter and summer.

Gasoline oil grade is divided according to the SAE viscosity grade. There are 6 kinds of winter oil, namely 0W, 5W, 10W, 15W, 20W and 25W. W represents the abbreviation of winter; the smaller the previous data, the greater the oil circulation and the lower the available temperature. There are 5 kinds of engine oil in summer, namely 30, 40, 50 and 60.

API quality level divides the oil into S series and C series. The oil of the S series is special for gasoline engines. There are 13 types of oil quality levels from SA to SP. The oil of the C series is dedicated to diesel engines, and the grades are CA, CB, CC, CD, CE, CF-C respectively. G-CH-CI-4.

The oil label usually indicates viscosity and quality. The specific interpretation is as follows: The viscosity of lubricating oil is mostly marked with SAE and other levels. SAE is the abbreviation of the American Society of Automotive Engineers in English.

What are the functions of automobile lubricants?

The function of lubricating oil is to reduce wear and friction. Lubricating oil can effectively reduce the friction of the friction surface and reduce energy consumption. For transmissions, brakes and other devices, lubricating oil can effectively control friction, thus effectively extending the service life of each component.Cool down. Auto parts will generate a lot of heat during running friction.

Splash lubrication: When the engine is working, the oil droplets splashed up when moving parts such as crankshafts and camshafts rotate or from the oil hole installed on the connecting rod head is used to lubricate the friction surface. The objects of lubrication are cylinder walls, cams, piston pins, etc.

Lubricating oil has many roles in the operation of the car. First of all, it is corrosion-resistant and protects the friction surface from oil deterioration or external erosion. Secondly, it reduces friction and wear resistance, reduces frictional resistance to save energy, and reduces wear to prolong the mechanical use time. There is also the cooling effect, which discharges the friction heat out of the machine.

Automotive lubricating oil is a kind of lubricating oil. Its main function is to lubricate the engine. In addition, it also has the functions of sealing, cooling, cleaning, anti-corrosion and anti-rust.

What is the classification of automotive lubricants?

1. Classification method of automotive lubricants: Automotive oils are divided into quality levels and viscosity levels. The quality level is commonly used in the standards of the American Petroleum Institute (API). Steam oil begins with S and is arranged in English alphabetical order. The later the letter, the higher the grade. At present, the commonly used grades are SG, SJ, SL, SM, SN.

2. According to the SAE method, lubricating oil is divided into winter oil, summer oil and winter and summer general oil. 1) The oil brands used in winter are: 0W, 5W10W, 15W, 20W and 25W respectively. The symbol W represents winter. The smaller the number before W, the smaller the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature.

3. ACEA European lubricant classification standard, the latest 2007 version is classified into 3 categories. They are: A/B series: gasoline and light-load diesel engine oil C series: adaptive catalyst engine oil E series: heavy-load diesel engine oil, among which A/B series includes: A1/B1; A3/B3; A3/B4; A5/B5.

How often should the car lubricant be changed

1. The standard is to change every 3 months, 5,000 kilometers. The oil change of the car is based on the mileage. Generally, mineral oil can be changed every 5,000 kilometers, and synthetic oil can be extended to 8,000 to 10,000 kilometers. In terms of time, cars that drive less than 5,000 kilometers in half a year should also consider changing the oil after half a year.

2. It mainly depends on what kind of lubricating oil the car uses. If it is mineral oil, it is generally replaced every six months or about 5,000 kilometers. If it uses semi-synthetic oil, it should be replaced every 7-8 months or about 7,500 kilometers, while fully synthetic oil should be replaced every year or about 10,000 kilometers. Times.

3. When using fully synthetic oil, it takes about 1 year or 10,000 kilometers to replace it. In order to replace the lubricant of the car, you can follow the following method: start the car for 1 minute first, raise the temperature of the car, and let the oil flow into the car. At this time, you can see that there are stains on the surface of the car, and it will be more thorough to replace the lubricating oil.

4. How often should the car lubricant be changed? The standard is to change it every 3 months, 5,000 kilometers. The oil change of the car is based on the mileage. Generally every 5Mineral oil can be changed once for 000 kilometers, and synthetic oil can be extended to 8,000 to 10,000 kilometers. In terms of time, cars that drive less than 5,000 kilometers in half a year should also consider changing the oil after half a year.

5. The replacement cycle of automobile lubricating oil is generally recommended to be between 5,000 kilometers or 7,500 kilometers, or 6 months. However, the replacement cycle is affected by many factors, such as vehicle conditions, road conditions, driving intensity and environment. If high-quality engine oil is used, the replacement cycle can be appropriately extended.

6. It is generally recommended to replace car lubricants every 10,000 kilometers. The importance of changing oil: oil is important for the engine, and blood is important for the heart.