
Methods to extract gasoline from a sedan: 1. Find a gasoline can or other airtight container; 2. Find a sufficiently long transparent ; 3. Place the can on the ground near the car's fuel tank; 4. Insert one end of the tube into the car's fuel tank and blow air from the other end; 5. Suck air from the other end of the tube with your mouth; 6. Quickly pinch the tube before gasoline enters your mouth; 7. Place the end of the tube into the can to extract the gasoline. The automobile fuel tank is the full name of a sedan's fuel tank. Automobile fuel tanks can be categorized into iron fuel tanks and aluminum alloy fuel tanks based on material. Aluminum alloy fuel tanks have higher corrosion resistance than iron fuel tanks.

Last time I helped a friend siphon gas, we had to prepare a long hose and a hand-operated fuel pump. You must turn off the engine and wait for it to cool down before inserting the into the fuel tank, otherwise it's too dangerous. Sometimes there's an anti-theft mesh at the tank opening, then you have to work from the fuel line connection under the chassis. I wore thick rubber gloves during the operation, and the tube must be inserted all the way to drain the fuel completely. Remember to prepare a metal container in advance to catch the fuel. The strong gasoline fumes in the air can easily cause dizziness, so it must be done in a well-ventilated area. It takes about half an hour to drain a full tank, and the waste oil must be sent to a recycling station—never pour it down the drain. Actually, the operation isn't too difficult but carries high risks. If there's static spark near the fuel tank, it could be disastrous.

Last month, I accidentally filled my car with the wrong fuel grade and had to siphon it out myself. I dug out the siphon hose I use for car washing and an empty oil container, being extra careful when inserting the clear flexible into the fuel tank. First, I had to remove the fuel pump fuse in the engine compartment to prevent accidental power-on. Then, pressing the hand pump head three times started the fuel flow. I nearly got nauseous from the fumes in the enclosed garage and quickly opened the doors and windows. After siphoning, I noticed sediment at the bottom of the tank and used a magnet to pick up some metal shavings. In total, I siphoned out forty liters into a recovery container—it was more exhausting than I expected. I ended up reeking of gasoline and had to shower three times.

When modifying a car, it's often necessary to empty the fuel tank. I'm used to using a manual fuel transfer pump with a transparent hose. First, locate the vehicle's repair manual to check the fuel tank structure. Some models have a flip valve in the fuel filler pipe, which can get stuck if you insert the hose directly. I've encountered situations where there's a filter screen at the bottom of the tank, requiring the removal of the fuel level sensor to completely drain it. During the operation, I laid out an anti-static mat and kept mobile phones away at all times. After draining, I found moisture in the fuel, so I replaced the fuel tank desiccant. Honestly, such tasks are best left to repair shops—the money saved by doing it yourself isn't even enough to buy protective gear.

Once when I went out, I found the fuel filler cap wasn't tightened properly and water got in, so I had to drain the entire tank. I prepared a graduated oil extraction bucket and an explosion-proof flashlight. Before inserting the hose, I disconnected the negative terminal of the to avoid sparks. During the draining process, I noticed static electricity when the tube touched the metal fuel tank wall, so I quickly switched to an all-plastic funnel for diversion. The extracted fuel was left to stand to separate the water, and the clear upper layer could still be used in my motorcycle. I wore goggles and a gas mask throughout the process, and washed my hands and applied hand cream immediately after handling the waste oil. Gasoline evaporates quickly, so the operation must be done swiftly.

I tried using a modified electric oil extractor made from an e-bike charger, which works by connecting two oil tubes. The tubes must be made of gasoline-resistant rubber material, as ordinary water pipes will dissolve. First, measure the fuel tank depth and cut the tubes to the appropriate length, being careful to avoid the float device when inserting them. Pressing the switch for five minutes can extract twenty liters, which is three times faster than a manual pump. After extraction, I found that residual gasoline in the pump head had solidified into gum after evaporation, so it must be immediately cleaned with carburetor cleaner. Later, I discovered that professional tools with automatic shut-off valves are available online, which are safer and more convenient.


