How to Prevent Condensation in the Fuel Tank

We all know how terrible it is when water is mixed with fuel, as it will affect the function of a vehicle or machine. While you are being so careful that water will not go in your fuel tanks, there are some case that water will mix into the fuel because of condensation within the tank itself. This is something that must be avoided. Condensation causes your car or machine to stop working and refuse to start. Furthermore, it causes rust in your gas tank, hindering its functions.

Here are some tips to help reduce fuel tank condensation:

Understand why condensation occurs in fuel tanks.

Condensation is mostly a result of a temperature change. Friction between the car and the hot road develops while driving on a road. Condensation forms in your fuel tank because of the heat transfer that mixes with the cooler gasoline. Water vapor builds up on any surface until drops of water form and will fall eventually, and mix into your gas.

The amount of air in the fuel tank must be restricted because air contains a specific amount of water vapor in it. Limiting the amount of air in the fuel tank can help reduce the amount of condensation as well.


Keep your fuel tank full or almost full of fuel.

Your tank should always be full or at least with fuel that is more than three-quarters or half-full. You don’t want your tank to keep running low on fuel, so you should fill it up every now and then. By doing this, the surface area inside the tank on which condensation can develop will be lessen. You can do this especially during humid or wet weather when you get a sudden change in temperature.


Put some fuel additive.

In the past, fuel did not contain the amount of ethanol like the one it does today. Fuel now contains at least 10% ethanol, which is an element that mixes well with water. When little condensation takes place in fuel tanks, ethanol in the fuel takes the moisture to the engine and burn it up.

If you can’t get fuel that contains some ethanol, you can use a fuel additive, which you can easily obtain from your local auto store. Because water is heavier than oil or fuel, it will float on top of condensation instead of mixing with it. The water can build up and sit at the bottom of the gas tank, with cause the tank to rust.

The fuel additive can be a great help. Just follow the directions on the container. Often times you can just pour it straight into the gas tank. Condensation can be minimized when the additive mixes with pure fuel because it is similar to ethanol. You can avoid fuel tank condensation if you’ll use fuel that contains water-soluble elements like ethanol or use fuel additives.

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