The worst thing to put in a gas tank? (Don’t Try This!)

If you’re like most people, you probably think that the worst thing to put in a gas tank is diesel fuel. However, this isn’t true! There are several things that you should never put in your gas tank.

The use of sugar or any other sweet, sticky liquid in a gas tank is a bad thing and will clog up the fuel filter just like honey does. This could lead to bad smells coming out from under your hood when you turn on engines with this oil mix present inside them.

Sugar doesn’t mix with gas, so if some get through the filter and into your tank, it will just sit at the bottom.

The fuel filter keeps sugar and other ingredients out of your engine, so it will never do major damage. 

However, if these foreign objects are allowed passage through the line, they can cause problems down the road.

It is important to clean the filter, fuel pipe, and gas tank because it removes their traces from your system.

  1. The worst is sugar
  2. Battery acid. 
  3. Water
  4. Bleach
  5. Salt
  6. Urine
  7. Brake Fluid
  8. Hydrogen Peroxide
  9. Wrong Fuel

The gas tank is one of the most important parts of your car because it houses all fuel for driving. If you don’t put anything but gasoline into this container, everything will be fine, but what if something else was poured? Well, then some things can ruin an engine and make matters worse!


The buildup of sugar in an engine can cause problems, including clogged filters and dirty fuel injectors.

You don’t want to play around with sweet treats because car engines aren’t built for sweet treats. 

When sugar enters an Autogas tank, it will remain at the bottom as sediment and settle throughout even if there are times when its surface gets disturbed.

This is because solids don’t pass through filters, so even if there were any sediment on top after pouring out some liquid from an uncovered container or jar-it would just stay at the bottom.

Battery acid.

The internal parts of the car’s fuel system would start to rust and degrade quickly, resulting in poor running conditions.

The acid would do a lot more than just hurt the metal. It could also dissolve any grease on its way. 

Everything gets increasingly slippery as it moves through each part of your machine- especially if there are no washes or preventive measures.

There’s no need to run out and buy expensive chemicals when you can use something as simple yet powerful – baking soda. Mixing one tablespoon with half a cup of hot water will do wonders in removing battery acid.

Apply the chemical mixture to posts and terminals with something old, such as a wire brush or paper cloth. If there is a fizzing sound after application, then it’s successful.

What Neutralizes Battery Corrosion?

The natural acid in vinegar or lemon juice will help you solve. First, make sure the area is completely dry before applying any chemical solutions- otherwise, they may reactivate again.


The consequences of water getting into your engine are dangerous and can result in malfunctions. 

This could cause hydro locking, which leads to failure, oil contamination causing transmission fluid, or electrical faults that may spark a fire due to short-circuiting between different parts of the car’s interior.

Rusting away at important friction points like pins craving connectors has happened before.

Hydro locking happens when water gets into the cylinders, causing engine failure. 

The combustion process in car engines is surrounded by lots and lots of heated gases that expand rapidly as they burn for fuel to produce power that moves cars forward. 

But if there’s any interruption like an oil leak or something else blocking its path, this system can be short-circuited.

The compression of the air-fuel mixture is easy because it’s mostly gaseous. However, water offers strong resistance. 

If this substance gets into your engine cylinders, you can expect wasted energy from turning pistons rather than achieving maximum power output!


The car will run for a while; it might stop and refuse to start. The worse this problem gets, the longer you leave the bleach in your tank (and there’s more than just water).

The bleach is comprised of two elements, chlorine, and water. The small amount of chlorine is an acidic oxidizer that will pre-burn or “precook” any fuel before getting into your engine’s combustion chamber. 

This can lead to it being more harmful than what was previously diagnosed as such by mechanics unfamiliar with this chemical makeup common in automotive settings today.

The best solution for removing bleach from metal and rubber parts is to use a biofuel additive (ethyl-alcohol). 

It can absorb the residue of this harmful chemical, leaving behind toxic sediments that could otherwise damage your engine’s health over time.

The bleaching effect of car fuel is more than just an ugly color! It’s also destructive to metal and rubber parts inside your engine. 

If you keep storing bleach-tainted gas there, expect to accelerate corrosion that will quickly eat away at anything made out of pump or injectors, even valves.


The salt in gasoline will not dissolve, but it can be mildly corrosionized by the moisture. You should always keep an eye on your car’s fuel level and never leave any excess behind when filling up.

The salt in our vehicles can cause corrosion and a buildup that could lead to clogged parts, which would decrease vehicle performance.

The long-term effects of salt in your gas tank are more damaging and cost you more. 

The short-term ones include preparing corrosion or rust components on vehicles, but if it stays there for too long, then everything from the fuel pump can be damaged by this salty liquid.

Whenever you notice the salt in your gas tank, it’s best to drain all the fuel from inside and change out any filters. 

You can also have someone else do this for safety reasons because changing anything on an engine might be tricky if not done properly, so they’ll know what needs fixing first.


The saltwater in your urine is what encourages rusting. The gas tank will affect where it sits since lighter fluids like gasoline float while heavier ones such as sea salt do not.

I am not sure whether a metal tank would appreciate the salty brine, but since water is heavier than gasoline and because there isn’t enough oxygen to cause rust in this case. 

I’d be more concerned about how it could affect your vehicle’s injectors.

Urine is not something you can take lightly, especially since it contains destructive properties to the fuel system. 

If this happens, there are serious consequences that will require immediate attention from professionals, so don’t ignore them.

Yes, peeing in the gas tank can damage an engine. Most steel tanks can withstand a little corrosion from urine or salt-soaked pants, but it’s still not good for your car.

Brake fluid 

Putting brake fluid in your gas tank can contaminate the oxygen sensors, especially silicon-based ones. 

Most of these compounds are phosphorus or zinc, so they’ll pollute even more than usual if you put them into any type, but let’s not worry about that.

A small amount won’t hurt since it’ll dilute itself with lots over time anyway.

The short-term effects of brake fluid in a gas tank aren’t that noticeable. However, it can already cause minor damage to the engine if you continue running your engine with such fluids packed into one car.

It’s important to know that if you keep adding brake fluid into your car’s Petrol Tank, it will eventually stop working. 

The pollution brought on by this can affect the performance and health of engines over time.

Hydrogen Peroxide

The presence of water means that hydrogen peroxide will have an additional corrosion effect on metal surfaces. 

This could lead to rusting and damaging vehicle parts when they come into contact with it, especially since these materials are typically made out of steel or other metals, which would then turn brown.

Hydrogen peroxide is a common household ingredient that some people believe can increase the speed of your car. 

However, many are cautious against using it because if you put this chemical in an engine-which will happen since they serve similar purposes. 

Then nothing well may actually come from its use and instead could cause major damage or even ruin any chance; at all for success with repairs afterward.

Hydrogen peroxide is a powerful oxidizing agent that will settle at the bottom of any container because it’s polar and non-soluble in chemicals with opposite electrical charges. 

When these two concepts come together, there will be some interesting reactions.

Wrong Fuel

Mixing petroleum and diesel is not the end of the world, as long you realize your mistake at the pump. 

Yes, getting the fuel tank pumped will be a hassle, but real damage could occur when driving away if unlucky, resulting in thousands of dollars worth of bills.

However, if you fail to turn the key in your ignition while filling up at a gas station, there’s nothing else to worry about. 

A few dollars usually go towards paying an attendant so that they may come to take care of things should anything go wrong with either machine.

The biggest mistake you can make is turning the key, even if there isn’t any engine to start. 

When headlights illuminate on the dashboard and fuel pump whirrs into life, this could mean your diesel-powered vehicle has been sucked up by petrol-powered one which means they’ll need draining & flushing and got rid of all that dirty gas inside its tanks.

Jim Harmer

I am Jim Harmer and I am in love with the outdoors. I share all the information I know on all activities I like doing in my home in this website. You are welcome to read and reach out for more information.

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