Car maintenance must be changed every time the oil must be changed, and every time the oil is changed, the after-sales staff of the 4S shop will always recommend a variety of different grades and labels of engine oil. So, do you know what these grades and designations mean, and what if you add them incorrectly?

Recently, some netizens said that when they entrusted a friend to help maintain the car, they should have added 20 viscosity engine oil but accidentally added 30 viscosity. The netizen was at a loss for a while, and didn't know if this situation had any impact on the engine? Do you need to replace it in time? First of all, we need to know what the various labels on the oil drum mean.

Generally, the common engine oil will be marked with 0W-20, 5W-30 and other labels, this W is Winter, the meaning of winter. Therefore, this parameter refers to the low-temperature fluidity of this oil, that is, its low-temperature viscosity index, which is generally divided into: 0W, 5W, 10W, 15W, and 20W. The lower the number in front of W, the lower the freezing temperature of this oil, for example, the freezing point of this 5W engine oil is -30°C, and if it is 0W, the freezing point can reach -35°C.

The number after W represents its high-temperature viscosity grade, which is generally divided into: 20, 30, 40, 50. The higher the number, the higher its kinematic viscosity at 100°C, which allows the engine to have a good oil film at high temperatures, reducing wear, but also making the engine's running resistance larger, thus becoming more fuel-efficient. Conversely, it may be beneficial to fuel consumption and power, but it is not suitable for high-speed, heavy-duty engines. Theoretically, the higher the viscosity of the oil, the better the protection of the engine. However, when an engine is designed, due to different processes and technologies, the working conditions of the engine are different. Therefore, it is necessary to choose the right oil products for maintenance.

If we add the wrong number of engine oil during maintenance, like that netizen, what impact will it have on the engine? Will it damage the engine? If the oil viscosity specified by the car manufacturer is 20, and the wrong addition is 30 during maintenance, there is no need to worry about this situation, because it is only a higher grade, and there is no problem with normal use. However, if we fill with 40 viscosity oil, we will generally feel that the acceleration resistance is high and the fuel consumption will increase a lot.

There is another situation, many German cars require to add 40 viscosity oil, if you accidentally add 20 viscosity oil, once you find this situation, do not start the engine again, change the 20 viscosity oil as soon as possible. If it is used for a long time, it will cause irreversible damage to the engine, such as excessive wear and tear such as pulling cylinders and burning oil. If the vehicle itself burns oil, then adding a low-grade oil will make this phenomenon even worse.

Therefore, even if you choose a brand with quality assurance such as Wells lubricants, you must also look at the label to choose the right oil. Wells lubricants have been adhering to the corporate culture of "quality for survival, reputation for development", and always put quality control in the first place. As a new generation of energy-saving and environmentally friendly fully synthetic lubricants, imported poly α olefin (PAO) high-quality fully synthetic base oil is added with imported Low SAPS compound additives, and blended by advanced technology. With the advent of the China VI era, Wells lubricants have been continuously improved on the basis of the original performance, adopting new technologies of low viscosity, low ash and low friction, which have superior low temperature start-up and fuel economy, energy saving and emission reduction; The formula of low sulfur, low phosphorus and low sulfate ash additives is used to effectively solve the low-speed pre-ignition of turbocharged direct injection engine and better protect the after-treatment system of the engine; The product quality level is the first to pass the API SP, CK-4 and ILSAC GF-6A/GF-6B standards, and is suitable for the latest China VI models.

Wells Lubricants has always adhered to scientific and technological innovation, technology research and development as the core drive, consolidated core competitiveness, innovative services and strong social responsibility, provided assistance and protection for consumers and customers, and continued to promote product transformation and upgrading. I believe that on the road of enterprise development, Wells will bring a better future to itself with better products.