1. "Less mileage at ordinary times" and "increasing refueling frequency" are a pair of contradictions.
2. The fuel delivery of EFI engine is absorbed by the electric gasoline pump installed in the gasoline tank under pressure, and its motor part is immersed in gasoline to cool the high temperature generated when it works. If the amount of oil is too small, it will damage the motor.
3. The original intention of Method 2 is to reduce the oxidation of gasoline in the fuel tank and maintain the quality of oil. However, there are two reasons that affect the oxidation stability of gasoline: its chemical composition and external conditions. As a car owner, you can't take care of both (less oil, easy to slosh, increase the chance of contact with air and accelerate the oxidation process. Hehe, a little picky. ), so add oil with guaranteed quality and try to use it up in a short time.
Teach a little knowledge
The ability of gasoline to resist the action of atmosphere (or oxygen) and keep its performance unchanged at room temperature and liquid phase is called oxidation stability.
During the storage and use of gasoline, it is often found that the color of gasoline becomes darker, resulting in thick deposits; Lead-containing gasoline will also appear gray precipitation. This is because some components in gasoline are oxidized by oxygen in the air.
The factors affecting the oxidation stability of gasoline are the chemical composition of gasoline and external conditions.
(1) Influence of chemical composition of gasoline on its stability. Aromatic cavity, burning baby, ringing Anhui; Strangely, it is not easy to react with oxygen in the air at room temperature. Therefore, gasoline, which is dominated by the above three strange things, has good stability and is not easy to deteriorate in storage and use. Unsaturated strange liquid phase at room temperature is easy to react with oxygen in the air. Therefore, if gasoline contains more unsaturated flares, its stability will be poor. When gasoline is stored and used, it is easy to deteriorate raw rubber or produce organic acids. Especially short unsaturated diene torch is the most unstable and easy to be oxidized. Although gasoline sometimes contains very little diene torch, it will significantly reduce the stability of gasoline.
In addition, non-cavitation compounds such as sulfur, nitrogen and oxygen in gasoline have different effects on the stability of gasoline. Generally speaking, the higher the content of the above three non-strange compounds, the faster the deterioration of gasoline.
It is worth noting that colloid is generated after gasoline oxidation, and colloid itself has oxidation catalysis. In other words, gum will accelerate the oxidation of gasoline. Understanding this law is of great significance to the use of gasoline, because it tells people that once gasoline is found to be raw, it should be used in time before the body mass increases sharply to prevent serious deterioration of gasoline.
(2) Influence of external conditions on oxidation stability of gasoline. External conditions include strength, oxygen, moisture and metal catalysis.
As the temperature rises, the oxidation speed of gasoline increases. When the ambient temperature is c-or, the process of gasoline oxidation is very slow. When the ambient temperature is higher than 15 e, the process of oxidation of rubber by gasoline is accelerated. If the ambient temperature is higher than 35 e, the oxidation process of gasoline rubber will increase exponentially with the extension of storage time.
The contact between air and oil level and the conversion intensity of air to oil level have great influence on the stability of gasoline. The filling degree of gasoline in the oil storage container determines the contact amount between gasoline and air. Whether the oil storage container is sealed or not determines the conversion strength of gasoline level air. If the contact between air and gasoline level is large and the conversion strength is high, the oxidation deterioration rate of gasoline will increase.
Metals can catalyze the oxidation of gasoline, and different metals have different catalytic effects. Among them, copper has the strongest catalytic effect, followed by lead. According to experiments, copper can increase the oxidation and scaling rate of gasoline by 6 times. In the fuel supply system of gasoline engine, there are not only copper (such as copper filter, etc. ), and lead (such as the lead coating on the inner wall of the container). Therefore, gasoline should be stored in a gasoline tank for a long time. Therefore, when storing gasoline, large containers should be used as much as possible. Use little or no small oil drums or oil tanks to store oil.
Gasoline contains water, which will also accelerate the oxidation of gasoline. So try to avoid water entering the oil.
For details of Ming Rui, please see Aika Auto /86/