Not Every American Knows: Why You Should Never Refuel with the Engine Running

At many gas stations, you can spot drivers who don’t bother to turn off their engines while refueling. Although the rules clearly advise against it, some people keep breaking this safety guideline. Here’s why drivers do it—and what risks they’re taking.

Why You Should Shut Off the Engine

The main reason is safety. In theory, even a small spark from the exhaust system can ignite gasoline vapors—especially with older carbureted cars or vehicles with modified exhausts. Modern engines greatly reduce this risk, but the rule hasn’t changed: the engine should be turned off when refueling.

There’s also a technical reason. If the engine stays on, the fuel gauge in some cars may not register changes correctly. Sometimes, after refueling, the gauge needle “freezes” and only updates after restarting the engine.

Why Drivers Break the Rule

• Fear of stalling: Some drivers worry their car won’t restart easily—especially older models or engines that can be harder to start when hot. They’d rather break the rule than risk embarrassment or inconvenience.

• Forgetfulness: In a hurry or distracted by passengers, people sometimes overlook the signs and reminders at the pump.

• Deliberate disregard: Others believe modern technology has eliminated the danger and intentionally ignore the warnings.

The Real Risks

Most of the time, fueling with the engine running doesn’t cause an accident—but the rules exist for a reason. A gas station is a high-risk area where vapors can ignite from even a small spark. The odds are low, but the consequences of an explosion or fire could be catastrophic.

On top of that, keeping the engine on can sometimes interfere with your car’s electronics: fuel sensors and self-diagnostic systems in certain models may stop functioning properly.

Ignoring safety rules at the pump is a good example of how small acts of carelessness can have serious consequences. Taking a few extra seconds to follow proper procedures protects both you and those around you.