how to siphon

How To Siphon Gas Out Of A Newer Car


August 10, 2022

Let’s learn more about how to siphon.

Being out of gas is a major pain.

There is no driver in the world who wants to be stranded with a tank and nowhere to get more gasoline.

It is possible, however, to transfer gasoline from one vehicle to another if you have another vehicle with fuel in the tank or are traveling with a friend in another car.

The issue is how to extract gas from a newer automobile.

Siphoning gas is not difficult, but it can be dangerous.

Due to the numerous modern automobiles having an anti-siphon screen or a rollover valve, which prevents fuel from leaking out of the tank in an accident, it has become more difficult over time.

You should only siphon gas as a last resort if you are in an emergency situation with no other choice due to the dangers to your safety.  

In this post, we will teach you how to siphon gas from a newer vehicle, and we will give the solutions to many frequently asked questions about it. 

Siphoning Gas From The Car – How It Works 

Gravity comes to the rescue, making it easy to extract gas from a vehicle without any equipment.

The science of siphoning is rather simple.

A flexible piece of tubing or long hose will be required in order to siphon gas from a car.

You must insert the hose into the tank via the gas cap on the side of the automobile in order to get rid of the gas. 

After the siphon has been inserted, you’ll need to insert the other end into a gas can.

This must be placed lower than the height of the car’s gasoline tank.

Gravity and liquids’ natural tendencies play an important role here.

The gas tank will fill up with fuel as the internal pressure forces it into the hose.

Once the fuel has entered the hose, gravity will carry it out of the tank and into your waiting gas can or container.

Due to the cohesive nature of liquids, the gas will now flow continuously from the tank as a result of high internal pressure. 

If you want to get the car out of there as quickly as possible, make sure you have some suction to alter the air pressure in the gasoline tank.

To accomplish this, use your mouth, finger, or a siphoning pump that is designed specifically for this purpose.

how to siphon

You have undoubtedly seen characters in movies sucking gasoline out of a hose with their mouths.

Swallowing gasoline, while it is fast, can be hazardous.

Instead of swallowing the gasoline directly, place your finger over the outlet end and raise and lower your finger – much like you would if you were pumping your foot on a pump.

The simplest method to create the suction needed to quickly drain gas from a vehicle is with a siphoning pump.

Firstly attach the pump to the end of the hose that will come out of the car and start pumping until you see gas flowing in that direction.

When you have got enough happening, stop pumping and let gravity take over. 

Is It Illegal To Siphon Gas?

It is a crime to siphon gas from another person’s automobile.

Siphoning gasoline is considered larceny, and those who do it may be required to pay a fine or go to jail.

However, if you have to extract gas from your own car for your generator at home, your lawnmower for personal usage, or to assist a friend in an emergency, this is not considered stealing.

You are most unlikely to go to jail if consent is given to siphon gas or you are just swapping petrol from one of your vehicles to another.

How To Siphon Gas Out Of The Newer Car

It used to be simple for gas sifters to siphon gas from a car: all you had to do was stick your hose down into the gasoline tank and there was nothing in the way.

Many more recent automobiles have an anti-siphon or rollover valve mesh, which blocks access into the gasoline tank. 

The rollover valve will not allow the pressure from developing up in the automobile fuel tank during normal use.

When any temperature changes occur, the valve allows vapor and pressure to escape from the fuel tank.

The rollover valve plays an essential role in maintaining proper ventilation of the gasoline tank.

It also aids in preventing any gasoline from escaping if the vehicle were to flip over in a collision. 

how to siphon

Siphoning petrol from cars that are newer, however, is more difficult. It’s not hard to drain the petrol tank in a vehicle that is somewhat older.

If you have a modern automobile and need to remove gas from its fuel tank, follow these instructions:

  1. Make sure all of your equipment is prepared. You will need 7-8 feet of plastic hose that is only one-fourth inch in diameter, a gas can, a thicker hose or big container, and a siphon pump (if using).
  2. To begin, make a narrow end on one end of the hose by cutting it at an angle. After that, you will need to open your car’s gas cap
  3. To clear the rollover valve, apply a pushing and twisting motion. It is difficult to insert a hose into the fuel tank of newer vehicles; you will only get it past the valve by twisting, which is why you need to use a smaller hose.
  4. Make sure your gas can or container is as low as possible above the fuel tank of your vehicle. This allows gravity to work properly and remove the gas from the car. 
  5. Once you have connected the free end of your siphon hose to a thicker hose, use the pump to force gas from one source into another. Pump until the gas starts flowing through the thinner hose. 
  6. Remove the pump from the hose and block the end with your hand before placing it into the gas can. 
  7. When the tank is empty or you lift the end of the hose higher than the gas tank, gravity will take over. Gravity will now do all of the work. The gas will continue to flow from the tank into the gas can until you pull up on the hose further than the fuel tank and stop gravitational pull. 

Frequently Asked Questions

What is the best way to defeat an anti-siphon device?

Using a siphon bottle to drain a car’s tank is more difficult than it looks, especially if you are trying to use conventional siphoning techniques.

To bypass the rollover valve while siphoning gas, simply follow the steps outlined in this article.

You may bypass an anti-siphon gadget; however, you will need a considerably smaller hose and a lot more patience. 

Is it harmful to siphon gas?

It is against the law to siphon gas from another person’s vehicle in all 50 states, and doing so can result in a fine, legal action, or even incarceration.

Siphoning gas can also put your health at risk. Swallowing fuel by accident might lead to aspiration when fluid enters the lungs.

Aspiration pneumonia is an illness that develops when air enters the lungs through a damaged diaphragm (windpipe).

It may cause a coma or death in severe cases.

How can you detect if someone is siphoning gas?

It is tough to know for sure if someone is siphoning gas from your car without seeing it.

However, if you keep an eye on your gas levels after each trip, you will be able to tell whether your tank is emptying too soon.

If someone has been siphoning gas, your gas cap may be damaged, and you might notice scratches and dents where thieves have attempted to pry open a locking gas cap, for example. 

What is the best way to extract gas from an automobile without a siphon?

Siphoning is the simplest and most efficient method of removing gas from a vehicle’s fuel tank.

If you do not have all of the necessary equipment, draining the fuel tank from underneath the car may be an option rather than through the gas cap.

However, this procedure for eliminating gas will not work on all automobile models.

To drain the gas tank, you will need to get down beneath your automobile and find it — a big metal container on the same side as your gasoline cap where you put the petrol in.

The small bolt under the fuel tank needs to be freed using a wrench or spanner.

The plug is released by removing the tiny bolt beneath the gas tank.

Make sure you have enough room under the plug to store the gas.

Reinserting the bolt will be impossible while the gas is draining out, so use this method only if you are comfortable removing all of the gasoline from your tank.

You may make a siphon using a garden hose or other long piece of flexible tubing if you do not have one. 

Is it possible for siphoning gas to harm your automobile?

Thieves may be costing you more than just the cost of another tank of gas if they attempt to steal gasoline from your automobile.

Thieves frequently employ force in an attempt to pry open lockable gas caps, leaving scratches and dents on your automobile.

If a gas cap is smashed, it might not fully close, causing the locking mechanism to be damaged.

It is not necessary to be an expert or have expensive equipment in order to safely siphon gas from your automobile.

You are only removing fuel directly from the tank with a siphon, so there is no need to worry about causing damage.

The most serious threats to your vehicle are putting the siphoning hose on and taking it off; doing this incorrectly can cause damage to the gas cap. 

What to do if someone siphons your gas?

It is against the law to siphon gas from someone else’s automobile.

If your gas tank is completely empty, it’s probable that a thief has taken your petrol.

To avoid this, you should install a locking gas cap on your vehicle.

It is also more difficult to siphon gas from modern automobiles, so you may want to consider buying a newer vehicle with a rollover valve/anti-siphon.

If you notice any odd behavior around your automobile or other parked vehicles, call 911 immediately.


It is important to know how to safely remove gas from a newer vehicle, especially if you live in an area that has frequent natural disasters.

It is still feasible to siphon gasoline out of modern cars, even though it might not be as simple as looping a hose down into one. 

We have compiled a simple, step-by-step procedure for siphoning fuel from modern automobiles.

We hope that this post may assist you in efficiently removing the gas from your automobile if you ever find yourself in need of gasoline.


Jeffrey Bryce is an experienced motorcycle rider with years of experience caring for motorcycles. His natural fondness for motorcycles have made him come up with, which is dedicated to answering and teaching you how to care for your bike with the care it requires. LetsGoForARide is the one of his important lifework in reaching out to communities of motorcycle enthusiasts on how to take care of their bike and choosing the correct spare part.