Can You Fill Up a Car with the Engine Running?

The Answer is Yes, but…

You can fill up a car with the engine running, but it’s not recommended. Here’s why:

It’s dangerous. Gas fumes are flammable, and running the engine creates sparks. If there’s a leak or spill, the fumes could ignite and cause a fire or explosion.
It can damage the engine. When the engine is running, the fuel pump is constantly circulating gas through the fuel system. If the gas tank is topped off, the excess gas can overflow into the fuel lines and carburetor, which can damage them.
It can void your warranty. Some car manufacturers void the warranty if you fill up the car with the engine running.

When to Fill Up with the Engine Running

There are a few situations where it’s okay to fill up with the engine running:

If you’re in a hurry. If you’re in a rush, it’s okay to fill up with the engine running, but be sure to turn it off before you start pumping gas.
If you’re at a self-serve gas station. At self-serve gas stations, you don’t have to get out of your car to fill up, so it’s safe to leave the engine running.

How to Fill Up with the Engine Running

If you need to fill up with the engine running, follow these steps:

Put the car in park.
Turn off the air conditioner.
Exit the car and open the gas tank door.
Insert the gas nozzle into the gas tank.
Start pumping gas.
When the gas tank is full, stop pumping gas and remove the nozzle.
Close the gas tank door.
Get back in the car and start the engine.

Conclusion

Filling up a car with the engine running is not recommended, but it can be done safely if you take the proper precautions. If you’re in a hurry or at a self-serve gas station, it’s okay to fill up with the engine running, but be sure to turn it off before you start pumping gas.