How do I identify the grade of lubricant? How are the grades of motor oil classified?

Engine oil can lubricate and reduce wear, assist cooling and cooling, seal leakage, rust and corrosion, shock absorption and cushioning of the engine. It is known as the "blood" of automobiles.

Classification of lubricating oil:

Divided by viscosity.

10W-40 is its SAE standard viscosity value, this viscosity value first indicates that the oil is a multi-grade engine oil, W stands for winter, the number in front of W represents the flow performance at low temperature, the smaller the value, the better the starting performance at low temperature. The number after w represents the stability of the oil at high temperatures (i.e., the possibility of thinning), and the higher the value, the better the stability of the oil at high temperatures.

Four-stroke oil.

The viscosity grade classification of four-stroke motor oils is based on the classification of the Society of Automotive Engineers and the SAE classification.

The winter oil grades of SAE lubricating oil viscosity classification are: 0W, 5W, 10W, 15W, 20W, 25W, 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;

The higher the number, the greater the viscosity, and the higher the applicable maximum temperature;

The winter and summer general oil grades of SAE lubricating oil viscosity classification are: 5W W W-50, the smaller the number representing the winter part (the lower the applicable minimum temperature), the larger the number representing the summer part (the larger the applicable maximum temperature), and the larger the applicable temperature range.

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I wish you a happy New Year's Day, hello, the grade of the engine oil is related to the classification specifications as follows the 1st SL level, this level is an ordinary mineral engine oil or semi-synthetic engine oil, the replacement cycle is about 6,000 to 7,000 kilometers Second, S M level, this is a semi-synthetic series of engine oil, the replacement cycle of this oil is 7500 kilometers, or seven months Third, SN level oil, this is a fully synthetic engine oil, the low temperature fluidity and lubricity of the oil is very good, The replacement cycle is one year or 10,000 kilometers Fourth, for the SP level engine oil launched by the new National VI models, this is also a fully synthetic engine oil replacement cycle, which is one year or 10,000 kilometers.

Hello, 1. Diesel engine oil.

There are two main bases for the selection of diesel engine lubricant quality grades. First, according to the sum of the mechanical load and thermal load of the automobile engine, it is expressed by the strengthening coefficient; Then it is according to the engine working conditions.

2. Gasoline engine oil.

According to the harshness of the engine working conditions and the additional devices in the intake and exhaust system of imported automobiles and the production age, the gasoline engine oil with the corresponding performance level (quality grade) is selected. Generally speaking, high-quality grades can replace low-quality oils, but low-quality oils should never be used to replace high-quality oils, otherwise it will lead to engine failure or even damage to Huaixin. Hope it can help you to ascend.