Motor oil is known as the "blood" of the car and plays an important role in the engine. However, for many novice drivers, they often do not know how to choose engine oil. So how to choose car engine oil? , let’s follow me and take a look. ?What is engine oil? Engine oil, that is, engine lubricating oil, plays the roles of lubrication, cleaning, cooling, sealing, reducing wear, damping and buffering, and preventing rust and corrosion in the engine.
What does the engine oil label mean? The words "SEA" and "API" often appear on the manuals of branded engine oils on the market. Among them, "SAE" represents the viscosity of the engine oil, and the following numbers range from 5 to 50. The larger the number, the higher the viscosity of the engine oil. "API" represents the grade of engine oil, and the following two letters represent the fuel used in the engine ("Q" represents gasoline, "C" represents diesel) and the level of engine oil ("A" is the lowest grade, "G" is the highest level, "C, D, F" are commonly used levels).
How to choose car engine oil? 1. Don’t believe in the statement of “special engine oil”? Engine oil only has SAE, API and other similar industry standards, because engine oil manufacturers do not develop engine oil according to a certain model, so There is no such thing as "special vehicle use" or "original engine oil", and those products packaged as "original engine oil" are actually produced by engine oil manufacturers, and are even commercially available engine oil.
2. Choose different engine oils in different seasons? Summer: Although the temperature is higher in summer, it is still dwarfed by the high temperature of around 100°C in the engine, so it is not too difficult to choose engine oil in summer. Affected by the environment. Since the viscosity of synthetic motor oil is less affected by temperature changes at present, and the engine technology produced in recent years has been updated and the components are more sophisticated, there is no need for a large motor oil viscosity. In most areas of our country, you can choose SAE?30 products. If your engine is older or has greater wear and tear, it is recommended that you choose SAE?40 products. ?Winter: It is recommended to choose a type with better low-temperature fluidity. If you are in a cold northern area, it is recommended that you choose a product with a label of 0W, such as Jinjixing J700U (0W-40?/?0W-50). If you are in the south where winter is not cold, it is enough to choose products with 5W and 10W labels. For example, Jinjixing series J500, J600, and J700 all have 5W-40 and 5W-30 products.
3. The more expensive the engine oil, the better. When changing the engine oil, you also need to look at the engine oil model corresponding to the engine. It is recommended to choose the oil model that suits your car according to the vehicle manual or the engine oil model stated on the engine casing. Engine oil. The composition of each brand of engine oil is different, and mixing them may cause some adverse chemical reactions. Therefore, it is not recommended to mix engine oils of different brands unless there are special circumstances. ?If there is too little engine oil, it will lead to insufficient lubrication and cause the cylinder to pull. But if there is too much engine oil, it will affect vehicle power and increase fuel consumption. In addition, the engine oil must be replaced rather than added. If you only add it without replacing it, it will lead to a poor lubrication environment inside the engine for a long time and accelerate the wear of various components.
How to identify engine oil? 1. Use the naked eye to identify it? Pour the engine oil into a transparent cup and view it. If the oil has good transparency, no suspended matter, no sedimentation, and no impurities and caking, it is better. of oil.
2. Smell the oil? Generally, the smell of engine oil is relatively mild. If there is a pungent smell, especially a strong smell of fuel, it may be recycled oil
3. Check the quality of the oil Level label: According to API standards, in the quality level label, the later the English letters are, the better the performance (for example, the SL level is better than the SG level, and the CF-4 level is better than the CD level).
4. Look at the viscosity grade label of the oil. Under the same quality level, the greater the difference between the numbers before and after W in the viscosity grade label, the wider the applicable temperature range, and the oil is a higher-performance engine oil.