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Can You Refuel Without Turning Off the Engine?

1 Answers

TaylorRose

07/25/25 10:43am

Refueling without turning off the engine is not allowed. The flash point of gasoline is only 50 degrees Celsius, meaning that when the temperature reaches 50 degrees, gasoline can flash and explode, which is extremely dangerous. When refueling, if the vehicle is not turned off, even though the car is stationary, the engine is still running at high speed. A running engine inevitably involves electrical currents, and if there is a short circuit or leakage at this time, it can be very hazardous. Precautions for using the fuel tank are as follows: 1. Do not wait for the low fuel warning light to come on before refueling: Before driving, check the fuel gauge and calculate whether refueling is needed based on the distance of the trip and the gauge reading. It is advisable to refuel in advance rather than waiting for the warning light to come on. The fuel pump is located inside the tank and operates at high temperatures when running continuously. Being submerged in fuel helps to cool it effectively. When the warning light comes on, it indicates that the fuel level is below the pump. Repeatedly waiting for the light to come on before refueling can shorten the fuel pump's lifespan, and having too little fuel in the tank may even cause the pump to burn out. 2. Choose to refuel in the morning or evening: Generally, temperatures are lower in the early morning and evening, and since gasoline has a low vaporization point, it is best to refuel during these times. Gasoline expands with heat and contracts with cold, and it is charged by volume. At lower temperatures, gasoline has a relatively higher density, meaning the mass per unit volume increases, allowing you to get more fuel. 3. Avoid filling the tank completely when driving in the city: For regular city driving, there is no need to fill the tank completely. A full tank adds extra weight to the engine, increasing fuel consumption. Since refueling is convenient in the city, there is no need to fill the tank to its maximum capacity.

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