For our car, the oil is like blood. But people often don't know how to use this blood, and the old driver explains it to us little drivers.
The full name of the oil is engine lubricating oil, its main role is to lubricate the engine, reduce friction and assist cooling and cooling, seal and leak-proof, anti-rust and anti-corrosion and shock absorption buffer and other major roles. However, it should be noted that the oil is divided into two parts: additives and base oils. Among them, the basic properties of the lubricating oil are determined by the base oil, and the additive can only improve some of the performance deficiencies, as well as give some new properties, which is also an important part of the lubricating oil.
So how often do we change the oil? In the minds of normal car owners we probably traveled nearly 10,000 kilometers after the change should be changed once, but this is often not very accurate, in fact, what oil to change is based on what oil you were using at the time to decide, if you were using mineral oil at the time, then we should be replaced in time when we travel to 3000 kilometers, when we use semi-synthetic oil, then when it reaches 5000 kilometers, it should be changed, so if we are using the best, fully synthetic oil, Then we should replace it at 10,000 kilometers.
But when we choose gasoline, we should pay attention to the letter w on it, which often represents the temperature and the meaning of winter in English. W has different numbers in front of and behind it. The number in front of W is generally the lowest temperature, while the number after it indicates the maximum temperature that this can withstand.
The lowest temperature is often the lowest temperature that can be tolerated at the moment. If the number is 0, then the minimum temperature that can be tolerated is -35 degrees, if it is me it is -30 degrees, and so on, when the 15w period is reached, the minimum temperature is minus 20 degrees. The numbers after w are generally 20, 30, 40 and 50, the larger the value, the better the protection of the oil at high temperatures, of course, the high temperature refers to the temperature of the engine when it is operating is not related to the temperature of the outside world.
As mentioned above, the types of oil are divided into mineral oil, semi-synthetic oil and fully synthetic oil, mineral oil is also the worst of all oils, so it can provide us with the least number of kilometers, and fully synthetic oil is the best oil in all, so it allows us to change the oil when we travel to 10,000 kilometers.
In fact, the most commonly used in our daily life is mineral oil, the price of mineral oil is often the lowest, but its lubricity and life are not as good as the other two oils, and this type of gasoline also has a great effect on environmental pollution. At the same time, this type of gasoline is not suitable for use in extreme conditions of low temperatures.
Semi-synthetic motor oil is actually refined on the basis of mineral oil using semi-synthetic base oil, its purity is relatively close to that of full synthetic oil, but because the content of mineral oil is relatively high, so his degree of use is not as good as that of full synthetic oil, but in the end it will be better than mineral oil, but the price will be a little higher than mineral oil.
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