Can You Siphon Gas From A New Car: Car Forum Answer

Siphoning gas from a vehicle is generally frowned upon because criminals often use the procedure to steal gas from parked vehicles. However, you might need to siphon gas from your car if you have an emergency, as newer car models tend to be more difficult to siphon gas from.

Can You Siphon Gas From A New Car? Yes, you can siphon gas from a new car, but you will need to park your car on a slope so that the suction pipe can get past the anti-siphon device and then use a pump to suck out the gas.

In a guide on siphoning gas from a car, NADAguides mentions that you can siphon with a professional siphon tool, air pressure, or with your mouth. The method you use depends on the situation you are in and the tools available at your disposal. However, mouth siphoning can be dangerous for your health.

Can You Siphon Gas Out Of Any Car?

Yes, you can siphon gas out of any car by using a siphoning hose and a gasoline container. However, siphoning gas from a newer car is a bit more difficult and tricky than siphoning from older cars. 

Siphoning gas is a necessary skill to learn, especially in times of emergencies, like when you have run out of gas in your other car or your generator. You can siphon gas out of any car, but for modern cars, it is a bit more difficult because of the anti-siphon valves and device that comes with modern cars, which prevents fuel from coming out of the gas tank during a car crash.

However, it is not impossible to siphon gas out of any car, you just need special equipment, the know-how, and lots of ingenuity.

Thanks to gravity, it is possible to suck gas out of a car without a machine. The science of siphon is very simple. To extract gas from a car, you need a long hose or a flexible hose. To remove the petrol from the tank, you will need to insert the hose into the tank through the gas cap on the side of the car.

Once the siphon is installed, the other end should be inserted into the petrol can. It should be placed below the level of the LPG tank. This is where gravity and the properties of liquids work. 

The air pressure in the gas tank begins to push the fuel into the hose. Once the fuel enters the hose, gravity draws it from the tank into the waiting gas can or container. Due to the cohesiveness of the liquid, the gas continuously flows out of the tank.

To make the process faster, you need to create a vacuum to change the air pressure in the gas tank. To do this, you can use either your mouth, your fingers, or a specially designed suction pump.

Suction using the mouth to suck on the pipe is probably the quickest way to siphon gas from a car, but it is very dangerous because there is a high risk of getting gasoline in the mouth, and even ingesting it. One safer method is by using your finger inside the other side of the pipe in and out motion to adjust the pressure in the hose.

The easiest way to generate the suction force needed to quickly suck gas from a car is to use a suction pump. Attach the pump to the end of the hose coming out of the vehicle and pump until you see the gas flowing towards you. Once the gas is moving, you can stop the pump and let gravity do it for you.

How To Bypass Anti-Siphon Device?

You can bypass an anti-siphon device by parking your car in a slant position, just so the siphon hose can slide past the anti-siphon device and get the gas, or by disconnecting the fuel line from the gas tank and turning the gasoline into the gas container.

Two devices can prevent you from sucking gas from your car. The first is an anti-siphon screen, which is a mesh strainer that keeps solids out of the gas tank and is usually above the fuel filler tube. The second one is the rollover valve, which is at the entrance of the tank.

This valve is designed to prevent fuel from rolling over and escaping the car, but it can also prevent the siphon hose from sticking into the tank. Therefore, this is often referred to as a siphon prevention valve or anti-siphon valve.

To bypass an anti-siphon device, you would need to take note of these steps and methods.

  • If your car has a siphon prevention screen – an anti-siphon screen – and no rollover valve, the simple trick to suck up most of the gas in the car is to park your car in a slant manner, and just suck up the petrol with a suction hose.

The siphon prevention screen usually works because it is well below the neck of the fuel filler tube. So, just park your car on a steep slope so that the filler goes downhill and the siphon hose can reach a portion of the petrol and suck up the petrol.

The siphon prevention screen in the car can also be broken, although, it is not recommended because it could block the fuel outlet if part of the screen falls into the tank.

However, if you need to do this in extreme situations, you would need a long, sharp object to penetrate the anti-siphon screen – no metal on the metal as it can generate sparks and sparks can cause huge fires.

One good material you can use is to use copper. Copper is highly conductive and usually does not generate sparks.

The copper wire alone will not be strong enough to get through the screen, however, one thing you can do is to create a copper ring and solder it to a copper pipe, then thread the pipe through the fuel tank and use the ring at the end to break the screen.

  • If you also have a rollover valve, you should bypass it as well. The automatic rollover valve allows gas to enter the tank in only one direction. Most rollover valves are either ball valves or flapper valves. You can bypass the rollover valve with the appropriate tool. However, doing so is very difficult and time-consuming.

To bypass and get gas from the gas tank, you can access the fuel from the other side of the tank. To do this, you may have to find the fuel line and remove it. You may need special tools to do this.

It is possible to make your fuel-cutting tool. Attach the hose to the end of the fuel line. Point to the other end of the hose at the canister and turn on the car. The fuel pump allows gas from the tank to flow into the canister. 

You must always turn your car on and off to maintain gas flow. If you cannot turn on the car, you can bypass the relay terminal of the fuel pump instead. This can be done with the engine off if there is a jumper – you can put a paperclip on the engine’s test plug to bypass the fuel pump.

  • There’s another way to bypass a rollover valve. You’ll need about 8 feet of ¼-inch plastic tubing. It should be stiff, but it should still be flexible. Cut the end of the tube diagonally to narrow the end. Insert the hose into the fuel tank. Use twist and push motion when hitting the rollover valve. This causes the hose to pass through the valve and into the fuel tank.

Then attach a thick hose to the end of the ¼-inch hose. Connect a thick hose to the siphon pump. Due to the very narrow hose, it takes about 5 minutes of the active push to suck up a gallon of fuel.

This method is much more difficult than it looks, especially because there is no way to see if the tube passes through the valve. However, if you are to use this method, you may need to purchase and test a replacement rollover valve. You can see what you are doing and understand the correct movement to put the hose into the valve.

What Year Did Anti-Siphon Devices Appear In Cars?

The anti-siphon devices first appeared in automobiles in the late 1980s and early 1990s. The device was designed to prevent fuel uptake. Suited for permanent installation, it is placed in the intake pipe of the fuel tank.

There is an hourglass-shaped balance spring, which is mounted and held in place by a tubular housing with three protrusions. Once the device is installed, the lower end of the device housing spring is positioned so that a significant portion of this spring is below the end of the fill tube. 

Then, with a downward movement, it sticks out directly into the fuel tank. In this way, it prevents the fuel from entering the reservoir quickly and prevents you from inserting tools such as tools to try to remove the fuel – a suction tube or hose to remove gas.

When it comes to sucking petrol from an old car, you can do so by following the steps mentioned in the previous heading, but newer car models have a siphon prevention device that simultaneously prevents backflow, tank pressure, and gas sucking.

This makes it impossible to use traditional suction techniques and tools, which could only damage your car. Therefore, you need a hose and a modern pump with a very small diameter. As far as the principle of gas extraction is concerned, it also applies to new vehicles.

Easiest Cars To Siphon Gas From

There are a lot of car brands that are easy to siphon from. This includes Acura, Audi, Cadillac, Fiat, Hummer, Infinity, Kia, Toyota, Volkswagen, Volvo, Porsche, and others.

Some car brands and models were tested, and their siphoning success resulting rates were found to be encouraging. Here are some of them:

  • Acura RDX 2017
  • Audi (A5 2010, R8 2011, and Q5 2014)
  • Fiat 500X 2011-2016
  • Hummer H2 2003
  • Volvo (S40 2005, S80 2011-2016, and XC90 2006)
  • Porsche (911 1999, Boxster 2013, Boxster S 2013, Cayenne 2004, and Panamera 2016)

How Do You Get Gas Out Of A Car Without A Siphon?

You can get gas out of a car without a siphon by disconnecting the fuel line – which is under the car – from the fuel tank, and then using a garden hose for easy drainage into the gasoline container.

Suction is the easiest and most effective way to drain gasoline from a car tank. If you don’t have all the equipment you need to drain the gas, try draining the fuel tank from under the car, and not through the gas cap.

However, this method of discharging gasoline does not work on all vehicle models. You need to go under your car and find a fuel tank, which is a large metal container on the same side as your gas cap where you fill the fuel.

You will need to use a spanner or wrench to loosen the small screw underneath the fuel tank – it is a plug. Make sure you have placed a container under the plug large enough to catch the gas. 

Replacing the screws while degassing is very difficult, so use this method only if you want to remove all gas from the fuel tank. If you don’t have a siphon, you can make one yourself using a garden hose or other long flexible hose.

Can Siphoning Gas Hurt Your Car?

Yes, siphoning gas can hurt your car, especially when tools are forcibly used on the gas tank parts, either while forcing the gas cap open, or sticking sharps through the anti-siphon devices.

Thieves often use force to break into lockable gas caps, and your car may have scratches or dents where they have tried to break in. If the gas cap is damaged, it will not close completely and the locking mechanism may be permanently damaged.

There is no damage if you siphon your car because it just discharges gas directly from the fuel tank, through the suction hose, to the gasoline container. The main risk of siphoning gas from a car is that the gas cap can be damaged when inserting and removing the suction hose.

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