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What To Do About Bad Gas In Car: Tips And Tricks

Gas is the lifeblood of a car’s engine, but what happens when the gas that you put in your car goes bad? Bad gas can cause problems for your car’s engine, and if left untreated, it can lead to costly repairs. In this article, we’ll discuss what causes bad gas, how to identify it, and what you can do to fix the problem.

What Causes Bad Gas?

There are several things that can cause gas to go bad. One of the most common causes is time. Gasoline has a shelf life, and over time, it can break down and lose its potency. Other causes of bad gas include water contamination, exposure to air, and exposure to heat.

How to Identify Bad Gas?

Identifying bad gas can be difficult, as it often looks and smells the same as good gas. However, there are a few signs that you can look out for. One of the most common signs of bad gas is engine performance issues. If your car is running rough or stalling, it could be a sign that the gas is bad. Other signs of bad gas include a strong smell of gasoline, a drop in fuel efficiency, and a noticeable decrease in engine power.

What to Do About Bad Gas?

If you suspect that your gas is bad, there are a few things that you can do to fix the problem. Here are some tips and tricks to help you get your car back on the road:

1. Drain the Tank

If you suspect that your gas is bad, the first thing you should do is drain the tank. This will remove any old or contaminated gasoline from your car and prevent further damage to your engine.

2. Replace the Fuel Filter

Once you’ve drained the tank, it’s important to replace the fuel filter. This will ensure that any remaining contaminants are removed from the fuel system and prevent them from causing further damage to your engine.

3. Refill with Fresh Gas

After you’ve drained the tank and replaced the fuel filter, it’s important to refill your car with fresh gas. This will ensure that your engine is running on clean fuel and help prevent future engine problems.

4. Use Fuel Additives

Fuel additives can help improve the quality of your gas and prevent it from going bad. There are many different types of fuel additives available, each designed for different purposes. Some additives are designed to clean your fuel system, while others are designed to improve fuel efficiency or boost engine performance.

5. Take Preventative Measures

To prevent bad gas from happening in the future, there are a few things you can do. First, make sure to always use high-quality gasoline from a reputable source. Avoid buying gas from unknown or untrusted sources, as this can increase your risk of getting bad gas. Additionally, it’s important to keep your gas tank full, as this can help prevent water contamination and exposure to air.


Bad gas can cause serious problems for your car’s engine, but there are things you can do to fix the problem. By following these tips and tricks, you can get your car back on the road and prevent future engine problems.


  1. Can bad gas damage my car’s engine?

Yes, bad gas can cause damage to your car’s engine if left untreated.

  1. How long does gas last before it goes bad?

Gasoline has a shelf life of about six months to a year, depending on the conditions it’s stored in.

  1. Can I mix old gas with fresh gas?

It’s not recommended to mix old gas with fresh gas, as this can dilute the quality of the new gas and cause performance issues.

  1. How can I tell if my gas is contaminated with water?

If your gas is contaminated with water, it may have a cloudy or hazy appearance and may cause your engine to run poorly.

  1. What should I do if I accidentally put diesel fuel in my gasoline car?

If you accidentally put diesel fuel in your gasoline car, it’s important to have the car towed to a mechanic as soon as possible. Running a gasoline car on diesel fuel can cause serious damage to the engine.

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