What to Put in Gas Tank to Ruin Engine and How to Take Care of It [2022 Guide]

What’s the best way to ruin the engine of your car? Call me crazy, but for curiosity’s sake, this is what we will focus on in the rest of this post. One of the ways to have it ruined is to not pay any attention at all in its care and maintenance. Even if it’s already obvious that the car is struggling because the engine is problematic, do nothing, and for sure, it will be ruined!

You can also ruin the engine by mixing additives in the gas! To know more about how to ruin a car engine through the gas tank, read on and I will share with you some of the things that can have the worst impact. Even when your intention is to just prank a friend, I suggest that you do not add anything dangerous to their gas tank as the repercussions can be serious.

What to Put In Gas Tank to Ruin Engine

Below are some of the things that you should make sure will not reach the gas tank.


Whether it is accidental or intentional, this is one of the things that should never get in the gas tank. It can cause the tank to rust and it will also stop the engine from running. First, it will cause the engine to run poorly, until it reaches the point that it will not run at all.

The bleach that you can buy at stores is usually made of two ingredients – chlorine and water. Since chlorine is a corrosive oxidizer, this is the component that ruins the engine quicker. It will cause a chemical burn as soon as it gets in contact with fuel.

Because it can cause rust and cause the engine to stop, see to it that it is immediately flushed out of the tank. You can also use an additive that inhibits corrosion.


It is still a subject of great debate whether it can actually ruin an engine or not. Why would you mix an artificial sweetener in your gas tank, in the first place? The good news is that with the fuel filter, it will be able to stop the sugar from reaching the engine.

There is no major damage that sugar can cause to the engine. It is not going to dissolve in gasoline, but this does not mean that the effect will be life-threatening. There can be clogs in the fuel system and will disable the filter. The worst thing that you can possibly experience is that the engine will stall and restart.

Hydrogen Peroxide

If you go online and do your research, you will see that there are some people who use hydrogen peroxide as an additive to gas or diesel, thinking that it will help in the improvement of its efficiency. The liquid is reactive and hence, this will damage not only the gas, but also the engine, and again, the performance of your car can end up suffering.


Whether it is corn syrup or karo syrup, among others, you also have to make sure that it will not reach your engine. The most common problem is that it can clog the fuel filter, and hence, will make restrict the flow of fuel. Because of this, the engine will stop running. It can travel all the way to the cylinder and the valve and the effects can worsen.

Wrong Fuel

If you have a diesel engine, unleaded fuel must never get into the tank. The same thing is true the other way around. You should use the fuel that is prescribed by the manufacturer. There will be no significant damage on the engine, but the problem is that it won’t start at all.

Taking Care of your Engine

Aside from making sure that you avoid the things mentioned above from mixing in your gas tank, here are more tips on how it is possible to keep the engine in its peak condition:

  • The best thing that you can do is to make sure that all liquids are changed regularly, such as coolant and oil. These liquids are essential in the functions of the engine, so they should be free from contaminants.
  • See to it that there is a constant flow of air in the hood, which will provide the engine with the opportunity to breathe. Just like humans, it needs air to survive. If there is no air, it will be more susceptible to overheating. This is also the reason why adding an auxiliary fan can prove to be an excellent idea.
  • Avoid start and stop driving, especially if you are not in the city. It will be better if you drive at a continuous speed since this puts lesser stress on the engine. If you stop more frequently, it does not only affect the efficiency of fuel consumption, but it can also speed up the wear of the engine.
  • Pay attention to your engine light. Once it is blinking, this is an indication that there is a problem and you have to act the soonest.
  • Regular inspection is a must. This will make it possible for you to spot a potential problem early on and solve it as soon as possible. Otherwise, this would mean costly repairs and inefficient performance of the engine.


Now that you are done reading, I hope that you have been enlightened on what to put in gas tank to ruin engine. Keep in mind that it is called a gas tank, so common sense would dictate that the tank is made specifically to hold gas and nothing else. Having it mixed with other things can ruin the engine and negatively affect the performance of your vehicle.