Will Forgetting to Turn Off the Engine Once While Refueling Cause a Fire?

[Brooklyn]

Forgetting to turn off the engine once while refueling will not cause a fire if the car does not produce sparks during operation at the gas station. Although it is a probability event, car owners should not take it lightly, as the consequences can be very severe if it happens. Car owners should remember to turn off the engine first before refueling at the gas station. Refueling without turning off the engine poses a fire hazard for the car, and in severe cases, it could even lead to a fire at the entire gas station. The car's engine operates at high temperatures continuously, and some electrical devices in the car may also be in working condition. If an electrical device experiences a short circuit, even a small spark could potentially cause a fire or even an explosion at the gas station.

[NoraLynn]

To be honest, I did this when I was young too. Once I was chatting with a friend and got so carried away that I opened the fuel tank cap directly. The gas station attendant turned pale with fright. Later I learned that the exhaust pipe temperature can reach several hundred degrees when the engine is running, and even a tiny bit of gasoline vapor drifting over could cause a loud bang. Nowadays, new cars even have static discharge strips near the fuel tank opening, yet gas stations still strictly enforce the rule to turn off the engine. If a fire were to start, it would be no joke—a full tank of gasoline is basically a large incendiary bomb. So remember, next time turn off the ignition before opening the car door. Making it a habit could save your life.

[McBeckett]

Last week, there was an incident at the gas station near my home intersection. The owner of the Cayenne didn’t turn off the engine while refueling. As soon as the fuel nozzle was pulled out, the auto start-stop system suddenly ignited, causing gasoline to splash onto the exhaust pipe, which immediately caught fire. Fortunately, the attendant reacted quickly and covered it with a fire blanket. The exhaust pipe reaches at least 200 degrees Celsius when idling, and gasoline vapor is guaranteed to flash-ignite at this temperature. Moreover, when the engine is running, the ignition coil generates high-voltage sparks, and flammable gas concentrations can be detected around the fuel tank opening. Just think about why gas stations post so many warning signs—they’re all lessons learned from blood and tears.

[Meghan]

A friend who worked at a gas station for eight years said he feared two types of people the most: those who smoke and those who don't turn off their engines. The friction of the engine pulley can generate static sparks, and rapid fuel flow can accumulate electric charges. Last year, during their station training, they showed surveillance footage where an idling minivan was refueling, and the electric sparks from the generator's carbon brushes ignited gasoline vapors, engulfing the front of the vehicle in just three seconds. Modern fuel dispensers now have foolproof designs, but even the best equipment can't withstand human negligence. It's recommended to develop the habit of locking the car while refueling; keeping the keys away naturally cuts off the engine.

[AndresAnn]

Data shows that fuel tank pressure changes during vehicle operation can increase hydrocarbon emissions by 60%. I vividly remember the experimental video conducted by the Ministry of Transport two years ago: a 0.6% hydrocarbon concentration was detected at the fuel tank opening of a running test vehicle, which already reached the lower explosive limit. At this point, any heat source in the engine compartment exceeds gasoline's flash point - for instance, a turbocharger housing remains above 300°C even half an hour after engine shutdown. Not to mention potential sparks from electrical system leaks. So don't believe those who say 'just once won't hurt' - all major accidents result from accumulated coincidences.

[DaisyAnn]

The repair shop has witnessed too many tragic cases. Last month, a Lexus we rescued was burned to a skeleton because the engine wasn't turned off while refueling. Later, it was found that the carbon canister solenoid valve had failed, causing fuel vapor to spray directly onto the hot oxygen sensor. Modern cars have hundreds of potential ignition sources hidden in unseen places: air conditioning relays, electric water pumps, even headlight fuses. Once, using a thermal imager on an idling exhaust pipe, we saw the front section reach 500°C. The vapor from just 10 liters of gasoline during refueling can fill a 3-square-meter explosion zone. For safety, don't try to save those 30 seconds—turning off the engine and removing the key is the right thing to do.