If you've been told that you can pump gas with the engine and electrics of your car still on, we'd advise against this. You shouldn't pump gas with the car on. Technically, you physically can put gas in your car if it's still running. But it's potentially dangerous. There may be a fire risk if the fumes get too hot. It's not about the actual liquid of the gas, but the fumes. It's also important to make your all of your electronic devices, like your cellphone or your laptop, aren't on charge in your car while you fill up. That's for the same reason too. It's best to just leave your cell in the car when you get gas because if you're on your cell, it can create static electricity.