How do you recognize the oil in winter oil?
Early this morning, we saw news reports that "the temperature in the Middle East is dropping suddenly, 10 provinces will usher in snow in early 2016." The circle of friends is also a picture of various kinds of snow. Friends on the road are still on the road, drive to pay attention to safety!
In the process of chatting with some card-friends recently, I discovered that many card-friends do not know how to choose oil for their car. The reason is that in winter, the temperature difference between the north and the south of China is relatively large, and the north is a relatively cold area. Card-mates often There will be a situation in which the car will not catch fire, so it is very important to choose a suitable engine oil. The following Xiaobian will tell you briefly how to choose oil in the winter.
â— First look at the oil marking
It is believed that the card friends all know that the engine oil has functions of cooling, lubrication, cleaning, rust prevention and anti-oxidation. The viscosity of the engine oil is closely related to the ambient temperature and the temperature of the vehicle itself. When you go to the gas station or you buy it, you will encounter the problem of what type of oil, you may give the choice of 10W-40, 15W-40. So what kind of model should be added? This requires card readers to understand what it means.
SAE and API are two groups of labels on the oil packaging. SAE (abbreviation of the American Society of Automotive Engineers) usually represents the oil viscosity, such as SAE40, SAE50 or SAE15W-40, SAE5W-40, "W “Winter†is suitable for use in winter, and the smaller the number in front of W, the lower the viscosity, the better the fluidity at work, the lower the available ambient temperature, and the cold start time of the engine. The better the protection.
The number after “W†is an indicator of the high temperature resistance of the engine oil. The larger the value, the better the protection performance at high temperatures. Only a set of values ​​such as SAE40 and SAE50 are called single-stage oils and cannot be used in cold winter months. SAE15W-40 and SAE 10W-40 have two values, 10 is the viscosity of oil in winter, and 40 is the viscosity of summer oil. It is called multi-grade oil and has a wider application environment.
The API is an abbreviation of "American Petroleum Institute", the latter letter combination represents the quality grade of the engine lubricating oil, and the different requirements for the lubrication of diesel engines in different years. For example, CH, in which "C" represents the lubricating oil for diesel engines, the latter letter indicates the higher the quality level of the engine oil. At present, the more common lubricating oils for diesel engines are CC, CD, CF, CF-4, CH-4, CI-4, CI-4+, and CJ-4.
â— Here's what you need to pay attention to when choosing oil:
With the development of the domestic transportation market, there are many types of oil on the market, which, to a certain extent, causes difficulties for users to choose. No matter whether the model or the grade is enough to make people pick flowers. However, the user still needs to select a more suitable engine oil according to the needs of the vehicle use environment. The higher the price, the better.
â— Avoid using inferior oil to reduce oil change intervals
The inferior oils do not possess certain properties of high-quality oils, which are indispensable for some high-strength engines. Therefore, certain properties of high-grade oils are indispensable. If poor oils are used to reduce the oil change intervals, In terms of the engine, it is impossible for the engine to meet certain special performance requirements. This will not only reduce the maintenance cost of the engine, but will shorten the life span.
â— New car old cars use different viscosity oil
In the new car or during the run-in period, the engine oil running at too large or too small viscosity must not be used. An oil with a moderate viscosity (such as 15W-40 or 10W-40) must be used. At the same time, a higher quality level must be used. The effect is good and the service life is long. After the run-in period, such as in the summer, the engine oil with higher viscosity should be used under heavy load or overload operation.
â— High sulfur fuel should use high base oil
At present, domestic diesel oil contains a large amount of sulphides due to its low refining technology. Used in engines, preferably with high base-value engine oils, to prevent the oxidation of engine components due to oxidation of the oxides produced by the sulfur in fuel.
â— Postscript:
Simply telling everyone how to choose the right oil, and finally to remind you friends have a car, do not blindly select the oil, according to the characteristics of the vehicle and the use of the environment change as needed, to the point of purchase with quality assurance, to avoid being Being cheated, hoping to make everyone gain something.
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