What To Put In Gas Tank To Ruin Engine? – Ultimate Guide

Last updated on February 12th, 2024 at 08:48 pm

The topic of what to put in gas tank to ruin engine is a serious one, as it involves the potential for damage to a vehicle and the potential for harm to the environment.

In this article, we’ll look at some of the most common substances people mistakenly put in their gas tanks and the damage they can cause. From sugar to oil, we’ll explain what happens when these substances are put into the gas tank, and how they can ruin your engine.

Additionally, we’ll also discuss how to prevent these mishaps from happening and what to do if you accidentally put the wrong substance in your gas tank.

By the end of this article, you’ll have a better understanding of what not to put in your gas tank and how to keep your engine running smoothly.

What To Put In Gas Tank To Ruin Engine

Putting Water

Putting water in a car’s gas tank can cause serious damage to the engine. Water is denser than gasoline and sinks to the bottom of the gas tank, which can cause the fuel pump to suck in water instead of gasoline. This can lead to several symptoms such as:

  1. Engine not starting or stalling
  2. Warning lights on the dashboard lighting up
  3. Reduced performance and power
  4. Unusual noises from the engine
  5. Reduced fuel efficiency

If water is accidentally put into a gas tank, it is crucial to take the car to a professional as soon as possible.

They will drain the water from the gas tank and check for any damage. If water has entered the engine, it may need to be rebuilt or replaced.

Additionally, the fuel filter and fuel lines need to be checked and replaced if necessary. Avoiding putting water in the gas tank is the best way to prevent this type of damage.

Putting Coke

Putting Coke or any other carbonated beverage in a car’s gasoline tank can cause significant damage to the engine. The chemicals in the drink react with gasoline, creating residues that can clog the engine. This can happen with any carbonated drink, not just Coke.

One way to detect this problem is by observing a lot of smoke coming out of the car’s exhaust with an unpleasant smell.

To fix this issue, it is recommended to take the car to a repair shop or an experienced car mechanic for an inspection.

They will be able to determine the extent of the engine damage caused by the drink. Unfortunately, this problem can be costly to fix as the reaction between the drink and gasoline is very strong and can cause severe engine damage. In some cases, the engine may need to be replaced.

To avoid this situation, it’s best to avoid leaving carbonated drinks in the car or ensure that containers are sealed tightly.


Sugar can cause severe damage to a car’s engine when put in the gas tank. Not only can it clog the fuel system, but it can also react with gasoline to create a thick, sticky residue that can damage the fuel filter and injectors. This can lead to reduced engine performance

It is important to address it as soon as possible. The first step would be to have the gas tank drained by a professional. Next, the fuel system should be inspected for any damage, such as clogged fuel filters or injectors, and should be replaced if necessary.

The engine may also need to be cleaned and flushed to remove any sugar residue.

Putting Salt

Putting salt in a car’s gas tank can cause similar damage to the engine and fuel system as sugar does. Salt can cause corrosion and rust in the fuel system, leading to clogged fuel filters and injectors, that can reduce engine performance and fuel economy.


Using bleach in a car’s gas tank can cause serious damage to the engine and the entire fuel system.

Bleach is a strong chemical that is meant for cleaning and disinfecting surfaces and should never be used in a vehicle’s fuel system.

Putting bleach in the gas tank can corrode and damage the fuel lines, fuel pump, and injectors, leading to leaks and even fire.

Additionally, the bleach can cause damage to the injectors, which can lead to poor engine performance and poor fuel economy.

Never use any cleaning agents or chemicals in the gas tank, as this can cause serious damage to the engine and the fuel system.

It’s important to note that, the cost of fixing the damage caused by bleach in the gas tank could be costly and time-consuming.

Brake Fluid

Brake fluid is not a fuel and is not designed to be used in a car’s gas tank. It is a hydraulic fluid that is used to transfer force into pressure, and to amplify braking force.

Putting brake fluid in the gas tank can cause a number of problems in the fuel system, such as clogging and corrosion.

The brake fluid can also react with the gasoline, creating a thick, sticky residue that can clog the fuel filter and injectors, reducing the engine’s performance.

Putting Hydrogen Peroxide

Putting hydrogen peroxide in a car’s gas tank can be extremely detrimental to the engine and the entire fuel system.

Hydrogen peroxide is a strong oxidizer that can cause serious damage to the fuel lines, fuel pump, and injectors.

It can also react with the gasoline, creating dangerous and potentially explosive fumes. Putting hydrogen peroxide in the gas tank can cause the fuel lines to corrode and crack, leading to leaks and even fire.

In severe cases, it can cause permanent damage to the engine, requiring costly repairs or even replacement.

Wrong Fuel

Putting the wrong fuel in a car’s gas tank can cause significant damage to the engine and the entire fuel system. It is important to not start the engine if you notice that you have filled the gas tank with the wrong fuel as it can put your car at great risk.

The best course of action is to immediately take the car to a professional mechanic who can drain the gas tank and fuel lines. They will remove the wrong fuel and flush the system with the correct fuel.

What Are The Critical Steps You Can Take If Someone Has Put Things Into Your Tank?

If someone has put something in your gas tank, it’s crucial to take immediate action to prevent further damage to your vehicle.

The first step you should take is to stop driving immediately. Continuing to drive the car can cause further damage to the fuel system and make the problem worse.

Next, you should write a report to the police and insurance company. If the car breaking down is not your fault, it’s important to report it to the police as it is considered a crime. Provide detailed information about where it took place, the symptoms, and anything else that may help the police understand that someone was trying to damage your car.

It’s also important to contact an insurance agent. The agent will send a specialist to inspect your car and check for damage. ‘

The replacement costs for any damaged parts will be either 100% or partially covered by the insurance company.

Make sure to let the repair shop know about this when you take your vehicle there for repairs

How To Prevent This In Future

There are several steps you can take to prevent someone from putting something in your gas tank in the future.

First, you should always be vigilant when filling up your gas tank. Pay attention to your surroundings and make sure that no one is near your car when you are filling up.

Second, you should consider installing a locking gas cap on your car. This will make it more difficult for someone to tamper with your gas tank.

Third, you should consider installing a camera or alarm system in your car. This will deter potential criminals and will also provide evidence if something does happen.

Fourth, you can park your car in a well-lit, well-populated area. This will reduce the chances of someone trying to tamper with your car.

Lastly, you should be aware of any suspicious activity in your area and report it to the authorities if you see something suspicious.

By taking these steps, you can reduce the chances of someone putting something in your gas tank and help to protect your car from potential damage.


I hope you enjoyed this article and found it informative. By following the tips discussed in the article, you can help prevent damage to your engine and fuel system and ensure your car runs smoothly.

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