Ethanol gasoline has strong water absorption, and ethanol gasoline will deteriorate, mainly because it will delaminate when it meets water. Ethanol is a bit like love rat. It first fell in love with gasoline. Alas, I can't tear it down. But the water came. "What is gasoline?" Go away! "I immediately abandoned gasoline and came together with water.

There is a paper in the magazine "Automobile Maintenance Technician", which is mentioned in the Question and Answer of Automobile Fuel Ethanol Gasoline. Ethanol has strong water absorption. If ethanol gasoline comes into contact with water, ethanol and water will be separated from gasoline, resulting in stratification, and ethanol gasoline will not burn normally.

The oil tank is not a sealed structure, and water vapor will enter.

The existing fuel tank is not a sealed structure. Even if there is no water in the fuel tank itself and there is water vapor in the atmosphere and air, it can still enter the fuel tank, which will cause ethanol gasoline to deteriorate for a long time.

There is a paper in the magazine "Equipment Maintenance Technology", which mentioned the research of automobile fuel tank ventilation. During the running of the car, with the consumption of fuel, a certain degree of vacuum will form in the fuel tank. At this time, it is necessary for the oil tank to communicate with the atmosphere to balance the pressure difference between inside and outside. At present, there is usually a built-in one-way valve on the fuel tank cover of an automobile. When there is negative pressure in the fuel tank, the valve will automatically open to let air into the fuel tank.

Too much water will have an impact on oil products and engines. If there is too much water in ethanol gasoline, there will be oil-water stratification, which will have a certain impact on our oil products and engines.

It's like: We may have diarrhea after drinking a cup of yogurt. There is a paper in Guangdong Agricultural Machinery magazine, which mentioned the harm of fuel mixing with water and its preventive measures. When water is mixed into the fuel, the additives and antioxidants in the fuel will decompose and fail, which will accelerate the oxidation speed of the fuel, and at the same time, it will also produce microorganisms and affect the quality of the fuel.

How long will ethanol gasoline deteriorate?

Doesn't mean it will go bad after the shelf life. As for the question of whether ethanol gasoline can be used after 1 month, we must first know that ethanol gasoline has basically no problem within the warranty period. But after the expiration date, it can't be said that it can't be used immediately, can't be used in situ, and can't be used immediately. You threw it out and added a new one?

Let's refer to the concept of food shelf life, which is defined in GB 77 18-2004 "General Rules for Labeling in prepackaged foods". Under the storage conditions specified in the label, prepackaged foods can still maintain its quality beyond this period, and prepackaged foods can still be eaten within a certain period.

There is a risk of deterioration after 1 month, so long-term storage is not recommended.

Back to the problem of ethanol gasoline, under normal circumstances, the car will put ethanol gasoline 1 month before driving, so you really don't have to worry too much, but if there are other factors, it may not be.

Official website, Honda Engine, said in the column of maintenance service that the maximum storage time of purchased ethanol gasoline should not exceed 3 months. And some factors will accelerate the deterioration of gasoline: air in the fuel tank, high temperature, high humidity environment and so on. The shortest shelf life may be only 15 days. Therefore, it is not unreasonable to suggest that gas stations run out within 15 days. It doesn't mean that/kloc-will deteriorate after 0/5 days, but in some extreme cases, the risk can't be said to be gone.

What should I do if ethanol gasoline really deteriorates?

We said in the previous video that adding a regular brand of dehydrating agent can reduce the water content of gasoline. But this was before it went bad. If delamination has occurred, causing some engine failures, additives can't solve the problem.

Mark's Marine Inc, a ship dealer in Iowa, USA, mentioned in official website that there is no additive or process to recombine the separated ethanol and gasoline except for large refineries. Is that once separated, you can't go back. At this time, it needs to be solved by some other means. There is a paper in the journal Traffic Energy Conservation and Environmental Protection, which mentioned the common faults and troubleshooting methods of vehicles using ethanol gasoline. The water content of ethanol gasoline exceeds the standard. The solution is to clean the fuel tank and oil system, and at the same time go to a regular gas station to refuel to ensure the quality of oil products.

It won't be a big problem to put 1 month.

If the water content of ethanol gasoline is too high, it will indeed deteriorate, and once it deteriorates, it can't be changed back, but if it is put in 1 month, the problem really won't be too big. If you are worried about deterioration, you can solve it by cleaning the oil circuit or adding a dehydrator according to the situation and degree.

Here comes ethanol gasoline. Is it good or not?

Ethanol gasoline is now only promoted in some places, and friends in many places have never used it: "What's it to me?" Is ethanol gasoline good or not? What are the advantages and disadvantages besides environmental protection? Many friends on the Internet have seen these rumors before. Germany has given up using ethanol gasoline. Is it true?/You don't say. Why do they do this in Germany? Why do we continue to promote ethanol gasoline in China?