Change the oil every 5000 km or 10000 km? Mechanic: What the 4S shop said is not true.

Many people question the 4S shop's statement about changing oil after 5000 km or 10000 km. If the car is not used frequently or the driving is gentle, and the performance of the car is good in all aspects, can the oil change interval be extended appropriately? For example, 15000 km. Today we will talk about this problem in detail.

Function of engine oil

Engine oil plays a vital role in the normal operation of the engine, such as lubrication, cooling and sealing. High-quality engine oil can prolong the service life of the engine and make it work in a good environment at all times. The performance of the oil itself will gradually weaken in the process of working, and the oil molecules are prone to some physical changes at high temperature, so the engine will lose its due protection, so this is also the reason why the oil must be replaced within a certain mileage.

Don't you need to change the oil if you don't drive often?

Some people say that I drive less and often park in the underground garage. Can I not change the oil? This statement is also wrong. Engine oil is a mixture of base oil and various antiwear agents. After a long time, the oil will deteriorate and lose its protective effect. Although some cars have not been driven for a year, the changed oil is still golden yellow, but the change of oil is invisible to our naked eyes.

But then again, it is not necessary for the staff of 4S to maintain the engine strictly according to 10000 or 5000 kilometers. It doesn't matter if the mileage is a little more than one or two thousand kilometers or the time is delayed for two months. As long as the oil is not changed for several years, it will generally not have much impact on the engine.

Is it really feasible to have a long oil change interval?

There are more and more voices praising synthetic engine oil in the market, and some brands have introduced engine oil with long oil change cycle. Although the quality of some brands of engine oil is worthy of recognition, the main thing that the car understands is that in most cases, replacing engine oil is not that the engine oil can't hold up, but that the machine filter can't hold up. Better mechanical filters on the market can generally be changed at 1w km, so even if your oil is changed at 15000 km, you must go to the store to change the mechanical filter at 1w km and wait for 5000 km to change the oil. Therefore, it is suggested that car owners choose products with close service life when choosing oil filters to reduce trouble.

Then, as a non-professional, how to judge whether the automobile oil needs to be replaced?

1.？ Look at the color and smell.

Take out the dipstick and dip it in a clean paper towel. If it is brown and has poor fluidity, it means that the oil has obviously deteriorated and has no protective effect, so change it quickly. If the color is yellow, it means that the oil has not been changed for a long time or the car has driven less since the last oil change, so you can drive for a while. But if the last oil change was a long time ago, it's better to change it again.

2.？ Instrument prompt

Nowadays, cars are simply set in the instrument after each maintenance, in case some careless owners forget to maintain them. If you notice that the instrument needs oil change, it is also necessary to drive to the store to check whether it needs maintenance.

The oil quality also has a great influence on the maintenance mileage. Generally speaking, synthetic engine oil can continue to provide effective engine protection at 65,438+00,000 km. If you also use a mechanical filter with a long replacement cycle, and the staff of the 4S shop still recommends replacing it 5000 kilometers, it is unnecessary.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.