Car oil can be said to be the blood of a car, and the longer the maintenance time of a good engine car. The owners are having trouble choosing oil. I don't know what kind of oil is better for the maintenance of my car. I don't dare to determine what oil to use for my own maintenance. The main thing is to look at what car owners use, car habits and car environment to decide which oil to use. There are three types of oil: mineral oil, semi-synthetic oil, and fully synthetic oil. These three classes how to choose it, let's north Mai Auto Parts Xiao Bian detail about what car maintenance oil O.K..
Mineral oil is made up of mineral base oils Class I, II and III plus additives. Usually the cost of mineral oil is very low, but the problem of mineral oil base is severe oxidation. Even if additives are used in mineral oil, the replacement cycle is generally about 5,000 km.
Semi-synthetic motor oil is a blend of mineral base oil plus PAO plus additives, which is slightly more expensive because of the high cost of refining. Compared to mineral oil, the advantage is anti-oxidation, the replacement cycle can be maintained at around 7000 km.
Fully synthetic motor oil is a kind of oil that people get better in order to obtain better performance. It is made up of PAO and additives. Synthetic oil barrels are marked with the word "synthetic" on the top. Compared with the former two, they have great advantages in terms of lubrication effect and anti-oxidation effect. The disadvantage is that the price is higher. Of course, the replacement cycle can be extended to about 7500-10000 km.
I have to say here, not all cars are suitable for synthetic motor oil. Just said so much, the fully synthetic motor oil does have very good performance and good fluidity. Whether it is cold start in winter or high temperature resistance in summer, it has excellent oil change period and can protect the engine. However, the fully synthetic motor oil is not suitable for tens of thousands of miniature and small cars...
Tens of thousands of economy cars, because the engine processing precision is relatively low, the gap between the cylinder and the piston ring is not the most delicate. This kind of engine often appears on the models with lower cost, which is more viscous. The oil is used to seal between the cylinder and the piston ring. If a relatively thin synthetic motor oil is used, there will be some minor problems in the sealing of the engine. And after parking, the whole synthesis will flow back to the oil sump, and the lubrication and sealing of the engine will be damaged. Therefore, after starting up in the morning, the engine will be greatly worn. If it is a thicker medium-grade oil, This problem does not occur in the engine.
Therefore, fully synthetic motor oil is good oil, but it is not suitable for low-cost economical car engines. The car within 100,000 yuan is generally less than 300 yuan of engine oil, between 100,000 yuan and 200,000 yuan is generally used for about 400 yuan of engine oil, and about 300,000 yuan is generally about 500 yuan of engine oil, 600 The oil above the yuan is more expensive. This is mainly to consider the cost of car maintenance, and also consider the normal work of the engine. Therefore, the number of maintenance kilometers specified by the car manufacturer is the most conservative mileage. In fact, it is more than the specified mileage. Running 1000 kilometers is no problem.
In fact, let's just say that you use a good amount of oil, the price is more expensive, the maintenance mileage reaches 10,000 kilometers. You use ordinary motor oil, the price is more suitable, the maintenance mileage is 5,000 kilometers. Overall, the price is not much worse. A good oil is the number of maintenance that has been omitted.
[Car maintenance oil related issues]
Because the turbocharger is too high in operation, any ball bearing can not withstand the strength of 100,000 revolutions per minute. Therefore, the main shaft is not connected to the ball bearing and the turbine body, but a floating design. The main shaft is floating in the oil. The extremely narrow space between the turbine body and the main shaft is filled with flowing oil, which not only acts as a lubricant, but also removes impurities and dissipates heat between the main shaft and the turbine.
The problem is here, still taking Baolai 1.8T as an example, the original factory 0.38bar boost value is generally between 10-15 thousand rev / min, the original engine oil is enough to support this speed and heat dissipation. However, after brushing the computer, the boost value will skyrocket and the turbine speed will skyrocket to 200,000-300,000 rpm. At this time, the original engine oil can not be saved. The original engine oil is not fully synthetic oil, and the viscosity of the oil is higher. High, low fluidity, so when the main shaft rotates at a high speed, the oil can not provide the lubrication and heat dissipation. Even some friends are outside the maintenance. The oil level is not even as good as the original engine oil. The problem with burning is that the turbine mentioned earlier is damaged.The fully synthetic engine oil is relatively thin, and the lubrication and heat dissipation are better. After the turbine speed is increased, the more dilute oil can flow 100% to the lubricated part, so there are no problems mentioned above.
2. Why are German cars generally changing oil for 7500-10000 km, and Japanese cars are 5,000 km for engine oil?
This is what has been said before, the relationship between mineral oil and synthetic motor oil. The original engine of the Japanese car (the price is less than 300,000) is usually mineral oil. The oil change period can not be too long. Generally, it needs to be replaced in more than 5,000 kilometers. The medium and high-grade Japanese cars (the price is more than 300,000). Semi-synthetic engine oil is generally used, so the oil change interval may be around 7500-10000 km.
The German car with a price of around 150,000, the original engine oil is basically semi-synthetic engine oil, so the natural oil change cycle will be 2,500 kilometers longer than the Japanese car of the same grade. The original engine oil of many German cars with a price of more than 200,000 is fully synthetic, and the oil change cycle theory can exceed 10,000 kilometers.
3. Why do some high-end cars burn a little bit of oil?
High-end cars generally use fully synthetic motor oil, and even many super sports cars use the fluid 0W-50 series of super racing oil. The fluidity of the oil is good, which means that the viscosity is more dilute. The benefits have been mentioned before. There is also a bad place because the oil is relatively thin, so the proportion of oil flowing into the combustion chamber from the cylinder and the piston ring is even larger. Therefore, the oil consumption is naturally much higher than those of the family car.
It is inevitable that high-end cars will burn some oil more or less, unless you do not use high-grade motor oil. However, if the consumption exceeds half a liter of oil per 2,000 kilometers, it is also problematic, not normal consumption.
4. Light change oil, can't you change the machine?
The oil is not only lubricated, but also the important thing is to take away the dirty things inside the engine. These dirty things are filtered by the machine filter. If the oil is changed, the dirty things can not be completely removed, so it is equal to It doesn't make sense to change the oil. Changing the oil must be changed to filter, which is a dead rule.
5. Is the oil replaced with black?
The oil mainly lubricates the various components inside the engine, especially the lubrication of the piston and the cylinder wall. Here, the product of the combustion is a dark gel, so the oil has changed color since it was injected into the engine. However, the normal use of oil should be dark brown, if it is completely pure black, it is also a problem, it is likely that the oil change cycle is too long.
6. Can different brands of engine oil be mixed?
Each brand of oil additives is not the same, mixed use may cause deterioration between chemical components, and it is not recommended to mix.
7. Car owners around the country, how to use the oil?
In the northeast, Xinjiang, and Tibet regions, it is recommended to use a relatively sparsely resistant 5W series of engine oil. In extremely cold areas such as the Arctic Circle, engine oils may even use the 0W series.
In North China, East China, and South China, it is recommended to use normal 5W-30/40 or 10W-30/40 engine oil;
In such extremely hot areas of Hainan, it is recommended to use 40 or 50 oil, high temperature resistance is a must;
What kind of engine oil is good for car maintenance, mainly depends on everyone's car habits and driving environment. If you change the maintenance service diligently, the mineral oil will be poorly resistant to oxidation, so the maintenance period is about 5,000 kilometers. The use of semi-synthetic motor oil and fully synthetic motor oil are all artificially synthesized by chemical methods, so the anti-oxidation is strong, and the general maintenance period is about 7500 km to 10,000 km, which means that the maintenance frequency is lower. It is also important to note that synthetic motor oils are not suitable for all kinds of cars, as already mentioned above. If you don't understand anything, you can go to the 4S shop to change and ask, and you can change the oil yourself and carry out your own maintenance.
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