How far can you drive after the fuel gauge light comes on?

1 Answers
LaAllie
07/29/25 3:36pm
When the car's fuel gauge light comes on, you can still drive approximately 30 to 50 kilometers. Here are some precautions regarding the use of the fuel gauge: Pointer indication deviation: When the fuel pump is operating, a negative pressure is created inside the fuel tank, reducing the tank's volume and causing the fuel level to appear higher. Additionally, the thermal expansion effect of gasoline due to temperature can naturally display a higher reading. When the temperature drops or the fuel tank is opened, the pressure is released, and the fuel level decreases accordingly. Therefore, such display deviations are normal. However, the deviation generally does not exceed the width of one pointer. Do not continue driving after the indicator light comes on: When the indicator light comes on, it indicates that the fuel level is too low. Continuing to drive at this point can be harmful because the fuel pump, located inside the fuel tank, generates a significant amount of heat during operation. The fuel acts as its coolant, ensuring the fuel pump functions properly by continuously cooling it. Without the cooling effect of the fuel, prolonged operation of the fuel pump will inevitably lead to burnout. Refuel promptly after the indicator light comes on: It is essential to refuel promptly after the indicator light comes on because the fuel pump relies on gasoline for both cooling and lubrication. Insufficient fuel levels can impair the fuel pump's normal operation and reduce its service life.
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