Most of the oil we need in our daily car maintenance is not an integer, only a few models are integer, and 4 or 5 liters of oil is just right. Most cars are 3.7-litre, 3.8-litre, 4.5-litre and so on. The oil capacity standard is 4 litres in large barrels and 1 litre in small barrels. Some cars can't fill up a big barrel, and some cars need a big barrel and a small barrel, but they can't fill up the small barrel. Anyway, there should be a little left.

It's a pity if you don't want it. It's also a waste. You can't save enough to take it away for a while.
As a young man who is used to being prudent.
At this time, I want to know how to deal with the extra oil. Can't I just throw it away?
How long can the remaining oil be stored?
Will the engine oil deteriorate after being stored for a long time?
What should I pay attention to when saving?
The remaining oil should be used within 1 year
If there is no unsealed oil, the general shelf life is 4 to 5 years. However, the shelf life of the opened engine oil is not that long. Suggestion: It is better to use the engine oil after opening it within 1 year.
For our normal cars, the maintenance time is mostly half a year or 5000 km, or 1 year or 10000 km, which is exactly within 1 year. That is to say, there is no major problem with the remaining oil after the next service.
Many people will wonder why there is such a big difference between sealed and unsealed storage time?
What affects the storage time of oil seal opening?
First of all, this is because after the oil is opened, there will be water mixed into the oil. When the water content exceeds 0.1%, the additives in the oil will become invalid and accelerate the oxidation process of the oil.
In addition, the additives in the engine oil will deteriorate when they meet the oxygen in the air, especially in the case of direct sunlight. It greatly reduces the oxidation resistance and cleanliness of the engine oil.

Finally, impurities mixed in the oil will affect the cleanliness and lubrication effect, cause abnormal engine wear, and even affect the sealing performance.
In fact, this is the same reason for the reduction of the shelf life of milk. For example, the shelf life written on the box is 6 to 12 months, or 7 to 14 days. You open it and take a drink. It's in the refrigerator. It may not last for 2 or 3 days. The reason is the same.
Many people's oil deteriorates quickly after opening, mainly due to improper storage.
How to keep the oil from deteriorating
1. Ensure tight sealing
After the vehicle oil is changed, cover the oil bottle with plastic film, and then tighten the bottle cap to prevent air from entering.

2. Avoid humidity, high temperature and sunshine

The engine oil should be kept away from moisture, high temperature and direct sunlight. If the seal is not good, the water in the air will enter the oil. In addition to the high temperature environment, the oil temperature will rise, and it is easy to deteriorate.
3. Avoid pouring all at once
When the remaining oil in the barrel is used for the second time, try not to pour it out completely, because there may be impurities generated during storage at the bottom of the barrel. If you pour it out completely, it will affect the purity of the original oil in the car.

4. Pay attention to the storage period

The shelf life of oil after being unsealed is usually about one year, but the shelf life varies with the composition of different oils. Within the shelf life, as long as it is a brand oil product purchased from regular channels, it can be used safely.
In the above analysis, we can also see that