The water in the fuel tank may be to blame for the engine performance problems. As little as half an ounce of water in a 50L tank can seriously affect engine performance and fuel efficiency, leading to corrosion of the fuel system. So how does water get into your tank? What can you do immediately to protect your engine? And most importantly, how do you fix it?

1. Understand how water enters the tank

Condensation: Temperature changes in the current location, especially on cold nights, can cause moisture to collect in your tank. Filling the tank will help reduce this.

External leaks: If your gas tank cap is not properly sealed, rain or even car washing can allow water to seep through.

Fuel tank cap: Damaged or missing fuel tank cap can cause water to enter.

2. Symptoms of water in the tank

Cars are difficult to start, and water may dilute your fuel.

The engine may suddenly sputter or shut down.

Speeding up compresses the gas, but a slow response could mean that the water is interrupting combustion.

The fuel was burning faster than usual, possibly from inside.

3. The effect of water on engine performance

Water and fuel are like oil and water – they just don’t mix. If you have water in your tank, it can wreak havoc on your engine and cause problems with the fuel system.

Combustion problems: Water destroys fuel combustion, causing fire and power loss.

Corrosion: Water in the tank can cause rust, which can clog fuel lines and damage injectors.

Fuel pump damage: Water is not a lubricant, so it can put pressure on the fuel pump and reduce its service life.

4. How to remove water from the fuel tank

Draining and replenishing: Draining the tank and refilling it with clean fuel is the most radical solution, preferably using reliable fuel.

Using fuel additives :Using water-absorbing additives can help with minor contamination.

Alcohol additive: Isopropyl alcohol mixes water with fuel to make it burn when burned.

If the contamination is serious, it’s time to seek professional help. They’ll drain the tank, clean out the system, and replace clogged filters.

5. Preventive measures to prevent water pollution

Keep your tank cap secure: Tight, well-sealed gas caps are the first line of defense against water entering the tank. Replace damaged or worn hats to prevent leaks.

Choose a reputable gas station: repair the tank and fill up at a station that uses quality fuel.

Regular vehicle maintenance：Routine maintenance is the key to catching water pollution early. During regular inspections, ask your mechanic to check the tank for water stains. If you’re driving a diesel car, they can also check the fuel water separator, as it’s a key component in removing moisture.