Reentering your vehicle while it's fueling up--- You might want to think twice before seeking refuge in your car from the cold, wind or rain while refueling. Getting in and out of your vehicle builds up static electricity on your body, which you could then transfer to the dispenser's nozzle. That tiny spark can start a fire. To discharge any static before reaching for the pump handle, It is recommended that you touch something metal, like your vehicle door. Did you know this was dangerous before reading this survey?

Topping off the tank--- Just one or two last drops of gasoline can't hurt, right? Not so fast. Those automatic shutoff valves are there for a reason, experts say. Gasoline needs room to expand, and overfilling the tank can build up pressure and lead to a dangerous leak. Plus, "you're just as likely to spill a few drops as you get them in your tank, and that's not cost efficient for you," Lenard says. You're better off sticking to the recommended amount. Besides, thanks to the gas pump's automatic shutoff feature, excess gas and vapors go back into the vapor-recovery system once the valve is triggered to close. So you're not really getting the extra gas anyway. In other words, topping off your tank is a bad idea both safety-wise and economically. Do you top off your tank?

Pumping gas into an elevated portable container--- Be extra alert when pumping gas into a portable can or container. According to the National Institute for Occupational Safety and Health (NIOSH), static-related fires have started when people filled gasoline containers in the plastic beds of pickup trucks or in cars with carpeted interiors. To avoid static build-up, NIOSH recommends placing the container on the ground before filling it. Wormser also warns against using empty milk jugs or other plastic containers. Always use certified gasoline containers, which are often bright red and have safety nozzles and pressure-release valves. Have you ever done this?

Leaving your car on as it refuels--- Even if you're just putting in a couple of dollars' worth of gas into your tank, you have to turn off your car. You might think leaving it running is a pretty harmless gas pump mistake, but it could have dangerous consequences. Gas vapors can mix with heat or static electricity, increasing the risk of fire—especially in colder, drier months, according to the Petroleum Equipment Institute. It is recommended that you double check that your car is in park and the keys are out of the ignition before you reach for the nozzle. Have you ever left your car running while pumping your gas?