What is the specific difference between different oil labels

February 17, 2024

What is the specific difference between different oil labels

Oil, that is, engine oil, can play a role in lubricating the engine and reducing wear. In addition to lubrication, oil also has the role of auxiliary cooling, sealing and leakage prevention, rust prevention and corrosion prevention, shock absorption and buffering, so it is known as the "blood" of the car. Today, we will focus on what the oil label means, so that the owner is no longer in trouble when buying oil.

Interpret the SAE number of the oil

Consider the oil labels in the example diagram

SAE: The American Society of Motor Vehicle Engineers, SAE grade represents the viscosity of the oil grade.

5W: "W" stands for winter (winter), the number 5 on the left of "W" indicates that the oil is suitable for the minimum external temperature of -30 ° C. The smaller the number in front of "W", the lower the low temperature viscosity of the oil, the better the fluidity, the lower the applicable external ambient temperature, the better the protection ability of the engine when cold starting.

20: The number 20 after "W" represents the viscosity value of the oil at 100 ° C of the engine is 7.5. The higher the number after "W", the higher the kinematic viscosity of the oil at 100 ° C.

Interpret the oil API label

Take the API label in the example diagram

API: is the English abbreviation of the American Petroleum Institute, API grade represents the classification of engine oil quality.

S: API engine oil is divided into three categories, the "S" series stands for gasoline engine oil. At the same time, the "C" series stands for diesel engine oil; When the letters "S" and "C" exist at the same time, it means that the oil is a general purpose diesel engine.

M: "M" stands for the quality grade of the oil. Oil from "SA", "SB", "SC"... To "SJ", each incremental letter of the oil will perform better than the previous one, and there will be more additives in the oil to protect the engine. The lower the letter, the higher the quality level.

GF-4: This value represents an oil classification specification of the American Motor Oil Association. For example, GF-4 certification requires the product to pass the EC energy saving certification on the basis of meeting the API SM quality level.

Interpret the type of oil

According to the extraction and synthesis technology, oil is divided into mineral oil, semi-synthetic oil, synthetic oil 3 kinds. In terms of grade: synthetic oil > semi-synthetic oil > mineral oil, the stability and anti-aging ability of synthetic oil is the best.

How to choose car oil?

According to the climatic conditions in most areas of our country, it is recommended that you can choose all-weather oil (such as SAE 15W-40, 10W-40, 5W-40, 5W-50), which is common in winter and summer.

SAE refers to the car maintenance manual

If Beijing modern car owners refer to the recommended range of engine oil in the owner's manual, you can choose the corresponding parameter oil. The following new Sonata Owner's manual recommendations:

The higher the API, the better

As for the oil quality, of course, the higher the better. Under the same label, the better the quality of oil will have a better performance in terms of emissions.

Select semi-synthetic/total synthetic

The same grade of oil in the price: synthetic oil > semi-synthetic oil > mineral oil, although mineral oil is cheap, but in all aspects of the performance is not as good as semi-synthetic, fully synthetic oil. Conditional car owners, it is best to choose a fully synthetic oil, so as to be able to protect the vehicle more comprehensively.

Author:

Mr. James

E-mail:

sales@cn-lubricantadditive.com

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+86 13783582233