Basic knowledge of automotive lubricants
author: Ann
2024-11-07
What are the lubricants for cars?
Engine oil: mainly used for car engines, car rear axles, manual transmissions, etc.;
Brake oil: used for car brake systems;
Automatic transmission fluid: used for car automatic transmissions;
Grease: used for lubrication and sealing of various bearings in cars.
What is the meaning of English symbols such as SAE and API?
SAE is the abbreviation of the American Society of Automotive Engineers; SAE represents the classification of oil viscosity grades. For example: SAE30, SAE40, etc. are single-grade oils, SAE10W-30, SAE15W-40, etc. are multi-grade oils; "W" means winter and low temperature.
API is the abbreviation of the American Petroleum Institute; API grade represents the classification of engine oil quality. The API engine oil classification system is divided into two categories: "S" series represents gasoline engine oil, such as: SF, SG, SJ, SL, SM, etc. (practical performance and quality grade increase in sequence); "C" series represents diesel engine oil, such as CD, CF, CF-4, CH-4, CI-4, etc. (practical performance and quality grade increase in sequence); S and C exist at the same time, which means it is a universal engine oil for gasoline and diesel engines, such as SF/CD, SG/CF-4, SL/CF, etc.
How to choose engine oil?
(I) First, refer to the "car manual" to select the appropriate quality grade, such as: Santana and Jetta require at least SF grade gasoline engine oil, and then make some adjustments according to the specific use conditions of your car, such as: city taxis are often in a stop-and-go state, trucks are heavy-loaded and travel long distances, and there is a lot of dust in the air, which will accelerate the deterioration of the engine oil. At this time, it is best to use an engine oil with a higher quality grade.
(II) Select the viscosity grade according to the climate and refer to the following chart to select the appropriate viscosity grade. In this way, the engine can be started smoothly at low temperatures and lubricated and sealed at high temperatures. In addition, try to use universal winter and summer oil, that is, multi-grade oil. For example, 15W-40 is suitable for temperatures ranging from -15 degrees Celsius to 40 degrees Celsius, and can be used all year round in areas with mild climates. More importantly, multi-grade oil has good low-temperature performance and viscosity performance, which can effectively reduce engine wear and save fuel. Note: Diesel trucks, especially heavy-duty diesel trucks, should not use multi-grade oil at will if there is no problem of starting at low temperatures, otherwise it is easy to cause oil pressure alarms, that is, red lights.
What is the difference in engine oil color?
The initial color of engine oil depends on the color of base oil and additives, and the color of general base oil will not be much different, so the initial color of engine oil is mainly determined by the depth or lightness of the additive color. The color of additives used in the same grade of oil from different manufacturers is different, and generally does not indicate the quality of the engine oil.
Different parts of the car should use different oils?
Because the working principles of different parts of the car are different, their lubrication methods are also different, so different parts should use different types of lubricants. For example: internal combustion engine oil is used in engines, and gear oil is used in manual transmissions.
Why are engine oils divided into different categories? How many categories are there?
The engine is the power source of the car, and the lubricating oil used in the engine is engine oil, also known as internal combustion engine oil. Due to the different fuels used in automobile engines, they are divided into gasoline engines and diesel engines. According to the different ignition methods and structural differences of the two fuels, gasoline engine oil, diesel engine oil, and gasoline and diesel engine universal oil are designed respectively.
Gasoline engine oil is divided into SF, SG, SJ, SL, SM, etc. according to quality grade, diesel engine oil is divided into CD, CF, CF-4, CH-4, CI-4, etc. according to quality grade, and universal engine oil is divided into SF/CD, SG/CD, SJ/CF-4, SL/CH-4, SM/CI-4, etc. according to quality grade.
Gasoline engine oil, diesel engine oil and general engine oil are used in different seasons and under different environmental humidity conditions. They can be divided into viscosity grades such as 30, 40, 50, 5W-40, 10W-30, 15W-40, 20W50, etc.
Engine oil: mainly used for car engines, car rear axles, manual transmissions, etc.;
Brake oil: used for car brake systems;
Automatic transmission fluid: used for car automatic transmissions;
Grease: used for lubrication and sealing of various bearings in cars.
What is the meaning of English symbols such as SAE and API?
SAE is the abbreviation of the American Society of Automotive Engineers; SAE represents the classification of oil viscosity grades. For example: SAE30, SAE40, etc. are single-grade oils, SAE10W-30, SAE15W-40, etc. are multi-grade oils; "W" means winter and low temperature.
API is the abbreviation of the American Petroleum Institute; API grade represents the classification of engine oil quality. The API engine oil classification system is divided into two categories: "S" series represents gasoline engine oil, such as: SF, SG, SJ, SL, SM, etc. (practical performance and quality grade increase in sequence); "C" series represents diesel engine oil, such as CD, CF, CF-4, CH-4, CI-4, etc. (practical performance and quality grade increase in sequence); S and C exist at the same time, which means it is a universal engine oil for gasoline and diesel engines, such as SF/CD, SG/CF-4, SL/CF, etc.
How to choose engine oil?
(I) First, refer to the "car manual" to select the appropriate quality grade, such as: Santana and Jetta require at least SF grade gasoline engine oil, and then make some adjustments according to the specific use conditions of your car, such as: city taxis are often in a stop-and-go state, trucks are heavy-loaded and travel long distances, and there is a lot of dust in the air, which will accelerate the deterioration of the engine oil. At this time, it is best to use an engine oil with a higher quality grade.
(II) Select the viscosity grade according to the climate and refer to the following chart to select the appropriate viscosity grade. In this way, the engine can be started smoothly at low temperatures and lubricated and sealed at high temperatures. In addition, try to use universal winter and summer oil, that is, multi-grade oil. For example, 15W-40 is suitable for temperatures ranging from -15 degrees Celsius to 40 degrees Celsius, and can be used all year round in areas with mild climates. More importantly, multi-grade oil has good low-temperature performance and viscosity performance, which can effectively reduce engine wear and save fuel. Note: Diesel trucks, especially heavy-duty diesel trucks, should not use multi-grade oil at will if there is no problem of starting at low temperatures, otherwise it is easy to cause oil pressure alarms, that is, red lights.
What is the difference in engine oil color?
The initial color of engine oil depends on the color of base oil and additives, and the color of general base oil will not be much different, so the initial color of engine oil is mainly determined by the depth or lightness of the additive color. The color of additives used in the same grade of oil from different manufacturers is different, and generally does not indicate the quality of the engine oil.
Different parts of the car should use different oils?
Because the working principles of different parts of the car are different, their lubrication methods are also different, so different parts should use different types of lubricants. For example: internal combustion engine oil is used in engines, and gear oil is used in manual transmissions.
Why are engine oils divided into different categories? How many categories are there?
The engine is the power source of the car, and the lubricating oil used in the engine is engine oil, also known as internal combustion engine oil. Due to the different fuels used in automobile engines, they are divided into gasoline engines and diesel engines. According to the different ignition methods and structural differences of the two fuels, gasoline engine oil, diesel engine oil, and gasoline and diesel engine universal oil are designed respectively.
Gasoline engine oil is divided into SF, SG, SJ, SL, SM, etc. according to quality grade, diesel engine oil is divided into CD, CF, CF-4, CH-4, CI-4, etc. according to quality grade, and universal engine oil is divided into SF/CD, SG/CD, SJ/CF-4, SL/CH-4, SM/CI-4, etc. according to quality grade.
Gasoline engine oil, diesel engine oil and general engine oil are used in different seasons and under different environmental humidity conditions. They can be divided into viscosity grades such as 30, 40, 50, 5W-40, 10W-30, 15W-40, 20W50, etc.
Introduction to Common Grease
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