How to Get Water Out of Gas Tank (Easy 6 Steps)

Your gas tank may have accumulated water for different reasons. Unless you’re an experienced person, you may feel slightly concerned about overcoming this issue.

You can get a hint of water in fuel by inspecting your car’s condition. For example, the engine may have compromised acceleration misfiring issues.

Initially, figuring out the root causes of this problem is necessary. Then, you can choose the perfect approach to remove water from gas tank.

Here we will direct you on how to get water out of gas tank step-by-step. Let’s dive in without wasting further time.

water in gasoline tank

How Does Water Get in The Fuel Tank?

If you have purchased the car recently, you may wonder why coolant or water is in your car gas tank. It can occur for multiple reasons. Here are the most common of them.

  • Inclusion Of Poor-Quality Gas

Where do you regularly fill up your car gasoline? If the petroleum station has a faulty water filter, H2O may get mixed and enter your gas reservoir along with the petrol.

This makes the gas quality low. Apart from reducing the engine performance, you will experience a wide range of issues.

  • Accidental water

Sometimes, you may forget to close the fuel tank door after refilling the gasoline. As a result, freshwater may get inside it when it remains open for an extended period.

  • Leaky Gas Tank

Another reason for gas line can be leaky or punctured petrol reservoir. Corrosion and regular wear and tear may lead to this problem.

  • Poor Environment Conditions

Poor environment conditions, such as extremely warm and humid weather conditions, can result in water in the gas reservoir after a certain time.

  • Damaged Or Corroded Gas Tank

If your gasoline reservoir has already become more than 15 years old, don’t be surprised after seeing water in it. It is prone to have wear and tear or rust over time.

  • Dysfunctional Fuel Pump

Where your car petrol tank is located? Is it top of the vehicle? If yes, it has a chance to get H2O when you pass through flooded roads due to faulty fuel seals.

Symptoms of Water in the Gas Reservoir

Wondering the probable symptoms of water in diesel? Here are some scenarios you can experience if you are keen to learn why the aquatic in gas treatment.

  • Unusual Water Evaporation

If you notice a higher amount of white smoke is coming through the exhaust pipe, it can be a clear sign of water accumulation in the container.

  • Hard Acceleration

A higher amount of aquatic in the oil container will affect the fuel sensors and ultimately cause a rough acceleration condition.

  • Difficulty to Start Engine

When H2O is stored in your gas tank for a long time, you will sometimes struggle to start the engine. It may occasionally not start at all.

  • Misfiring Engine

Having liquid in the combustion chamber will result in engine misfires. This generally occurs due to the wrong mixture of H2O and fuel.

  • Lower Acceleration

Water in the fuel system will cause the engine to fail and prevent achieving the right fuel and air ratio. This will affect its performance and cause lower acceleration.

  • Increased Fuel Consumption

Are you refilling your fuel reservoir more frequently than before? It can be another symptom of the presentence of liquid in your gas container.

How to Get Water Out of Gas Tank

It is common to fail to have a smooth driving experience liquid is present in your gasoline or fuel reservoir. You have learned why this issue occurs and the common scenarios you will experience due to this problem.

Quickly getting rid of this problem is necessary to prevent damaging the car engine. Here we are mentioning how to get water out of fuel tank step-by-step.

Step: 1 — Utilizing a Fuel Additive to Remove Water

At first, you want to dig out the primary cause of water in your car cng container. Then, you can implement the best solution.

If it is only a few portions of aquatic, fuel additives are a simple and effective option to consider. A wide range of oil additives is available in the market.

Choose a particular one that seems appropriate to you. But don’t use any fuel additive if your reservoir has a considerable amount of liquid. This won’t be effective.

Step: 2 — Removing Everything from the Gas Container

Are you still facing difficulty even after using fuel additives? This might be a significant problem. Removing everything from the petrol container seems better.

It is an effective solution to drain all water from the oil reservoir. If your car model is too old, you will need a helping hand or a professional man to empty the container.

But many latest cars have draining options, so you can automatically get rid of the water. However, it will take several hours to get all liquid out completely.

Step: 3 — Changing the Fuel Filter

The fuel filter may have partially or fully damaged if you are still not getting any effective results even after performing both steps properly.

This generally happens when liquid sits inside the gas tank for a long time. An increased amount of mineral content of water causes damage to the filter.

Dirt and debris from the H2O will clog the fuel filter. In such a case, replacing the filter appear the best solution to avoid further problems.

The more time you take to change the fuel, the more additional damage it will cause to the filter and other engine parts. So, change it soonest.

Step: 4 — Doing a Fuel System Flush (If Necessary)

Are you still thinking of how to remove water from gas tank? If yes, you can perform a fuel system flush. So, what is flush?

Generally, water and other dirt and debris will be removed from your fuel reservoir through flushing. Many mechanical shops offer this service.

But you need to be a little bit careful white getting type of service. In fact, many car experts don’t recommend performing this procedure.

Apart from being an expensive option, this flushing system damages the fuel pump, tank lining, and sensors. It is not mandatory. Think twice before doing it.

Step: 5 — Filling Up the Gas Chamber

After coming to this step, we believe you have already learned how to get water out of gas can and successfully removed the unnecessary liquid from it.

It is an important phase. You should only refill the gasoline reservoir if you have succeeded in finding the reason and finally getting water out of gas.

Now, inspect the condition of your vehicle after adding fuel to the container. Is it working smoothly? Are you still facing difficulty?

If no problem persists, you have achieved what you are sweating for. You can now freely drive your car and go for a long drive!

Step: 6 — Taking Help from a Professional

When your car shows tricky issues, it is not a piece of cake to solve the problem just by yourself, especially if you are not an expert.

It is necessary to have a professional person inspecting your vehicle’s problem with Gas Tuner. You may read the wrong problem.

It is best to take your vehicle to a nearby reliable mechanic shop when you are confused to figure out the root cause of the problem.

Along with that, you have no option but to take the car to a garage shop to replace the filter and do a fuel system flush.

This article aims to learn what can cause your vehicle gasoline reservoir to have liquid and the possible methods to solve the problem.

Water removing from Gas Tank


  • What happens when water enters your diesel tank?

When liquid enters your diesel container, it will sit to the bottom area of the container and lead to rust and algae issues for sitting for a prolonged time.

  • Does gasoline float on water?

Since the density of water (1.0 g/ml) is higher than the density of gasoline (0.6 g/ml), gasoline will float on fluid.

  • Does Seafoam remove water from diesel?

Yes, Seafoam has a special formula to get rid of liquid and other aquatic particles from any diesel fuel tank. It will make the engine operation smooth and efficient.

  • Can water damage a diesel engine?

Water can cause significant damage to both a diesel reservoir and its container due to rust and corrosion issues over time. It will cause engine wear gradually.


When it comes to a car’s internal issues, quickly addressing the issue is crucial. Otherwise, it will cause severe damage. If you notice unwanted water inside the gas container, first determine the root cause, and remove the liquid soonest.

Hopefully, you have learned all the important things on how to get water out of gas tank. It is always best to take it to a reliable, professional mechanic if you struggle to figure out the problem. You should not delay it. After all, vehicle issues are related to a heavy budget if the issue is significant.


Shafiqule Islam is a graduated Mechanical Engineer. He has both on hand and managerial job experience of 15 years in automobile maintenance field. He served as Captain in Electrical and Mechanical Engineering Corp of Army, Technical Head in Taxi Cab business, Head of Plant in Car assembly plant. He is writing automotive contents to share his expertise knowledge to car lovers for solving their vehicle issues.

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