The basic steps to fill your tank
Adding fuel to your car takes about five minutes and follows the same sequence every time. Drive to a gas station, pull up to a pump on the correct side of your car, open your fuel door, unscrew the cap, insert the nozzle, and squeeze the handle until the pump stops. Most pumps stop automatically when your tank is full, so you do not have to watch the numbers or guess when to stop.
The hardest part for new drivers is usually remembering which side of the car the fuel door is on. Check your owner's manual or look at the fuel gauge on your dashboard — there is a small arrow or triangle pointing to the side where your fuel door sits. This matters because you need to pull up to the pump on that side.
Key Takeaways
- Your fuel door is on the side indicated by a small arrow next to the fuel gauge on your dashboard.
- Pull up to the pump on the correct side, turn off your engine, and open the fuel door by pushing or pulling it from inside your car or from the door itself.
- Unscrew the fuel cap by turning it counterclockwise, then insert the correct nozzle type for your vehicle and squeeze the handle until it clicks off automatically.
- Most pumps accept credit cards, debit cards, or cash payment at the register, and you can choose your fuel grade before you start pumping.
- Screw the fuel cap back on tightly after pumping, close the fuel door, and drive away — there is no need to check anything else.
Finding the fuel door and positioning your car
Before you pull up to a pump, know which side your fuel door is on. Look at your dashboard where the fuel gauge sits. Next to it you will see a small arrow, triangle, or pump icon pointing left or right. That direction tells you which side of the car to position at the pump. If you cannot find it on the dashboard, check your owner's manual or ask someone at the station.
Pull up to an available pump on the correct side. You want the pump to be on the same side as your fuel door so the hose can reach comfortably. Turn off your engine before you get out. Most fuel doors open from inside the car — look for a small lever or button on the floor to the left of the driver's seat, or sometimes on the door panel itself. Push or pull it and the door will pop open. Some older cars require you to push the door itself from the outside to open it.
Choosing the right fuel grade and inserting the nozzle
Before you pump, you need to know what fuel grade your car takes. This is printed in your owner's manual and usually also on a sticker inside your fuel door or on the dashboard. The three common grades are regular (87 octane), mid-grade (89 octane), and premium (91 or 93 octane). Most cars run on regular. Using a lower grade than recommended can damage your engine over time, but using a higher grade than required does not help and costs more.
Unscrew your fuel cap by turning it counterclockwise. Set it somewhere you will not lose it — many people place it on top of the fuel door or hold it in their hand. Look at the pump. It has three or four nozzles hanging from it, each labeled with a fuel grade. Pick the nozzle that matches your car's requirement. Insert it into your fuel door opening and squeeze the handle. The pump will start counting up. Most pumps have a small lever or notch on the handle that you can set so the pump runs without you holding it the entire time.
Letting the pump stop automatically and paying
Modern pumps have a sensor that detects when your tank is full and stops the flow automatically. You do not have to watch the numbers or estimate. The pump will click off on its own, usually with an audible sound. When it stops, you are done pumping. Do not try to squeeze more fuel in after it clicks — the tank is full and any extra will spill.
Payment happens before or after pumping depending on the station. At many stations, you swipe your credit or debit card at the pump itself before you start. At others, you pump first and then go inside to pay at the register. Some stations require you to prepay inside before pumping. If you are unsure, ask the attendant or look for signs on the pump. Cash payments usually require you to go inside and tell the attendant which pump number you are using.
Finishing up and leaving the station
After the pump stops, remove the nozzle and return it to the pump. Screw your fuel cap back on by turning it clockwise until it is snug. You will feel a slight resistance when it is tight enough — do not force it. Close your fuel door by pushing it until you hear it click. Get back in your car and drive away. There is nothing else you need to check or do.
If the pump does not stop automatically and keeps running after your tank feels full, turn the nozzle handle to the off position and remove it. This sometimes happens with older pumps or if the sensor is not working correctly. Never leave the pump unattended while it is running, and never try to overfill your tank intentionally.
What to do if something goes wrong
If the pump will not start, check that you have paid or that your card was accepted. Walk back inside and ask the attendant to turn on the pump for you, or try a different pump. If your fuel door is stuck, try opening it from inside the car first. If it still will not budge, do not force it — ask the station attendant for help or take your car to a mechanic.
If you accidentally put the wrong fuel grade in your tank, do not panic. Putting premium in a regular car does no harm. Putting regular in a premium car occasionally will not cause when ready damage, though doing it repeatedly can cause engine knocking. If you put diesel in a gasoline car or vice versa, do not start the engine. Call a tow truck and have the tank drained before driving.
Frequently Asked Questions
What happens if I put the fuel cap on too loose?
A loose fuel cap can cause your check engine light to come on because the car's emissions system detects a leak. Tighten it by turning it clockwise until you feel resistance. If the light is already on, tighten the cap, drive for a few days, and the light usually goes off on its own.
Can I pump fuel while my engine is running?
No. Always turn off your engine before you start pumping. Fuel vapors are flammable, and running the engine creates a spark risk. It is also illegal at most stations and can result in a fine.
Why does the pump keep stopping before my tank feels full?
The pump sensor detects that your tank is full and stops automatically. If you want to add more, you can squeeze the handle again, but most cars do not need this. Overfilling can cause fuel to leak from the overflow tube underneath your car.
Is it better to fill up when the tank is half empty or wait until it is almost empty?
Filling up when the tank reaches one quarter full is easier on your fuel pump than running it completely dry. Running on empty regularly can damage the pump over time. There is no fuel savings difference between filling up early or late.
What should I do if I spill fuel on myself or the ground?
If fuel gets on your skin, wash it off with soap and water. If you spill fuel on the ground, move away and tell the station attendant when ready. Do not try to clean it up yourself. The station has procedures for handling spills safely.