How often should I change car oil? How often to change the car oil

Many 4S stores will advise the owner to maintain their car once the mileage of the vehicle is less than 5,000 kilometers or within three months of using the car, mainly to change the engine oil. Many car owners who have just bought a car are not impressed, and many more car owners have found it unnecessary after driving in person. But the old driver tells you:

Don't exceed this mileage, otherwise it will be easily scrapped.

Why change engine oil? The engine oil on the market is mainly composed of base oil and additives, and its main role is to lubricate the engine in high-speed operation, help cool the engine, prevent the engine from contacting moisture in the air, and so on.

If you don't change the oil for a long time, the effect of the oil will be greatly reduced. Not only does oil not protect the engine, it can even hinder its proper functioning. Because there are a lot of carbon elements in the composition of the engine oil, if it is used for a long time, the oil will undergo a chemical reaction to produce stains, and the excess carbon will precipitate and attach to the engine, which will affect the skill of the engine and make the engine fuel consumption**.

If not cleaned up in time, it can even damage the engine.

Back to the question, how often should we change the oil? Is it really reasonable for the 4S store to say 5000 km? We have to analyze this problem on a case-by-case basis, and what kind of engine oil you choose will determine how often you change it.

There are currently three types of motor oils on the market, which are mineral, semi-synthetic, and fully synthetic. Mineral motor oil has a high carbon content and is the worst lubricating effect of the three. If you choose mineral oil, you will need to change the oil about once every 5,000 kilometers.

If you choose semi-synthetic oils or synthetic oils, they add a lot of synthetics in addition to the base oil to ensure the lubrication of the oil and extend the life of the oil. If you choose these two oils, the oil will be changed once between 8,000 km and 10,000 km. Some engine oils have a longer shelf life, and of course, they will be more expensive.

But no matter what kind of oil, don't exceed 20,000 kilometers, otherwise the engine is easy to scrap!

And the 4S shop, regardless of 3721, let you come to maintenance once when you drive to 5000 kilometers, which is not necessary. Some will even let you wash the engine, which is not expensive, but the effect is exactly the same as the effect of changing the engine oil or adding fuel treasure.

Therefore, when maintaining your car, you must not be led by the nose of the 4S store, and you must combine your actual situation and analyze the specific problems, otherwise you will suffer a loss.

Change the engine oil once every 5000 kilometers or change the engine oil once a year, which of these two indicators comes first. For example, when we arrived at 5,000 kilometers, even if we only drove for two months, we had to do maintenance. If the year is up, even if you only drive 3,000 kilometers, you still have to do maintenance.

When a new car travels up to 3000 km, it is better to change the oil once.

How to determine the oil replacement time depends on what type of engine oil is used.

Engine oil, that is, engine lubricating oil, can lubricate and reduce friction, assist cooling and cooling, seal leakage, rust and corrosion, shock absorption and cushioning for the engine. It is known as the "blood" of automobiles. Engine oil is made up of two parts: base oil and additives.

Base oil is the main component of lubricating oil and determines the basic properties of lubricating oil.

Car oil is changed every 7,500 kilometers or every 6 months.

In practice, there is no mandatory oil change cycle. Generally speaking, it is judged whether it needs to be changed according to the mileage of the engine oil, such as the mileage of mineral engine oil is changed every 5000 km, the semi-synthetic engine oil is changed every 7500 km to 8000 km, and the fully synthetic engine oil is changed every 10,000 km.

Engine oil is a chemical product, which will gradually decay the performance of the oil with the increase of time and the destruction of high temperature and high pressure of the engine, and at the same time will produce certain impurities and accelerate the wear of the engine, so it is necessary to replace the new oil to play a better role in lubrication and protection.

Engine oil is made up of two parts: base oil and additives. Base oil is the main component of lubricating oil, which determines the basic properties of lubricating oil, and additives can make up for and improve the shortcomings of base oil performance, give some new properties, and are an important part of lubricating oil.

How to determine whether an oil change is necessary

1. The engine makes a screeching sound when it is running. In this case, it may be that the viscosity of the oil is not enough, which leads to a decrease in lubrication effect. At this time, it is necessary to change the oil in time.

2. High fuel consumption and serious engine shaking.

3. If the engine temperature is too high, the cooling system may fail due to insufficient oil.

4. The engine is abnormal, and the noise in the cylinder can be heard. At this point, it may be that mechanical friction debris enters the oil pan and is constantly carried into the cylinder with a crashing sound as the oil is transferred to the live slag plug.

5. Check the oil gauge directly. If the oil level is below the minimum limit line, replace it with new oil.

6. When the oil is emulsified, foamed, blackened, impurities or viscosity is reduced, the stove beam should be cautious, and the hidden base oil should be replaced in time.

The replacement cycle of automobile engine oil is generally about 1 year or 10,000 kilometers, while the replacement cycle of semi-synthetic engine oil is 7,500 kilometers or about 6-8 months, and the replacement of mineral engine oil is about half a year or 5,000 kilometers.

Judgment on whether it is necessary to change the oil:1.When the engine is running, there is a harsh sound, which may be because the viscosity of the oil is not enough, resulting in a decrease in lubrication effect, and then it is necessary to change the oil in time.

2.High fuel consumption and severe engine shake occurred.

3.A high engine temperature may be a failure of the cooling system due to insufficient oil.

4.The engine is abnormal and can hear the noise in the cylinder. At this point, it is possible that debris from mechanical friction enters the oil pan and is constantly carried to the cylinder with a crashing sound as the oil is transferred to the piston.

5.Look directly at the oil scale, and if the oil level is below the minimum limit, you should change to a new one.

6.When the oil is emulsified, foaming, blackening, impurities or viscosity decreases, the oil should be changed in time.

Generally, the oil change is determined in two directions. The first is the number of kilometers. And then there's the time it takes. Generally, fully synthetic engine oil is used, which can reach 7,500 to 10,000 kilometers. The time can be within a year.

Fully synthetic engine oil is now changed every 10,000 kilometers or every six months, whichever comes first.