Is it better to fill up the gas tank or not? Why can't you make a phone call when refueling?

Cars have become a necessity for everyone's life. Over time, if you can't drive your car one day, you will feel like something is missing. This is enough to show the convenience that cars bring to modern people. But if the car is out of oil, it will be difficult to move. So today we will talk about these common sense things about refueling the car.

Contents of this article

1. Is it better to fill up the car's gas tank or not?

2. Do you need to turn off the car when refueling?

3. Why can’t you make phone calls while refueling your car?

4. What are the reasons why the car fuel cap cannot be opened?

Is it better to fill up the car's gas tank or not?

Just fill it up almost to the top. If the fuel level of the car is too low, the fuel pump cannot be soaked by the fuel, and the heat dissipation will be affected to a certain extent. If the heat dissipation is not timely, the life of the fuel pump will be shortened. In addition, filling the tank almost to the top can reduce unnecessary troubles and reduce the number of frequent visits to the gas station. Driving to the gas station also consumes a lot of fuel. When the fuel is not filled to the nominal height, the bleed valve will be open all the time. When the fuel is filled to the nominal height, the valve will close and the gas cannot be discharged. The oil level will rise and the gun will jump. If the car's fuel tank is in a "semi-starved" state for a long time, it will cause damage to the car, because the vehicle is often in a low fuel state, and the fuel pump will often be emptied when encountering bumpy roads. This will cause the DC motor to be in a state of overheating and overload, which will shorten the service life of the gasoline pump. Not to mention that it costs hundreds of dollars to break a fuel pump, it will not be worth it if the vehicle breaks down on the road.

Should I turn off the car when refueling?

Turn off the engine. If the car is not turned off when refueling, the concentration of the oil-gas mixture around the vehicle's fuel tank will increase. If sparks appear while the car is running, the gasoline molecules in the air can easily be ignited, causing a fire. If the car is not turned off when refueling, the engine will continue to work. In this case, if a short circuit or leakage occurs in the vehicle circuit, the consequences will be very serious and will bring great safety hazards. If the car is refueled without turning off the engine, the gasoline will easily spray out when the fuel tank cap is opened, and the foam produced during refueling will also be easily sprayed out. If it encounters an open flame, it will immediately ignite, with very serious consequences.

Why can't you make phone calls when refueling your car?

1. A mobile phone is a radio communication tool. The radio waves emitted by a radio transmitter can induce radio frequency current in the antenna receiving the radio. When the radio frequency current circulates between metal conductors, if there is corrosion or poor contact, radio frequency sparks will be generated. When the radio frequency spark lasts for more than one microsecond and the energy is greater than 6 milliwatts, it will ignite the mixture of methane and air. Since gasoline is a volatile substance, the radio frequency sparks generated by mobile phones can easily cause explosions in the combustible gas danger zone formed by leakage of oil and gas tanks and natural gas pipelines, leading to disasters.

2. When a gas station uses a fuel gun to add gasoline to a car or motorcycle tank, the gasoline vapor in the empty tank will float outward, and the newly injected gasoline will also evaporate into the air, causing the density of gasoline vapor around the refueling vehicle to increase sharply. In order to make the communication signal clearer, people use mobile phones with high frequencies and strong transmission power. Although they meet national standards, they also pose a serious threat to gas stations;

3. When loading and unloading oil at a gas station, if it is cloudy or foggy with high humidity and low air pressure, the density of oil vapor will increase accordingly due to poor air circulation, and the possibility of explosion caused by making or receiving mobile phone calls will further increase.

What are the reasons why the car fuel cap cannot be opened?

1. The fuel tank cap does not pop open most likely because it is stuck or rusted. At this time, you can ask the gas station staff to help, pry or tap it slightly, and remember to press the fuel tank cap switch to open it.

2. Most vehicles now rely on motors to lock the fuel tank caps. If the fuel tank cap cannot be opened, it is likely that the motor is broken. Some vehicles are equipped with emergency opening of the fuel tank cap. This is a test of whether you have checked the vehicle manual in advance. The emergency opening of the fuel tank cap of many vehicles is under the cover on one side of the fuel tank cap of the trunk. Pull the emergency handle slightly and press the fuel tank cap at the same time to open it. After refueling, check the fuel tank cap control circuit as soon as possible.

3. The fuel tank cap spring may have lost its elasticity. The car owner can install a small spring on the protruding rubber pad of the fuel tank to increase the elasticity between the fuel tank cap and the locking device.

4. In cold weather, if the fuel tank cap cannot be opened, it may be because the weather is too cold and the fuel tank cap is frozen. At this time, you should be smart and choose the corresponding method according to the corresponding conditions, such as pouring hot water, forcing it open, etc. It is recommended to clean the fuel tank cap frequently. There is usually a drain under the fuel tank cap. If the drain is blocked, or it is easy to cause water accumulation during car washing and rain and snow, and the fuel tank cap will be frozen after ice.