How to Dispose of Old Gas [3 Best Ways You Can Try]

Gas is a hazardous material and must be disposed of properly. If you have any old gas cans or tanks lying around, it’s important to take the necessary steps to get rid of them safely.

This blog post will outline how to dispose of old gas safely for both you and the environment. Keep reading for more information!

What Exactly Is “Old Gas”

Old Gas
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Old gas is any gasoline that has been sitting in a container for more than six months. The gas will start to break down and become less effective over time, so getting rid of it is important before it becomes a problem.

If you’re unsure how old your gas is, it’s always better to err on the side of caution and dispose of it as soon as possible.

Why Is Old Gas Dangerous

There are two main reasons why old gas can be dangerous.

First, as mentioned above, the gas will break down over time and become less effective. If you try to use it in your car, it may not work as well as it should and could potentially damage your engine.

Second, old gas can also be very explosive. If it’s left in a container that is not properly ventilated, it could build up pressure and explode, which could cause serious injury or damage to property.

How to Identify Old or Bad Gasoline

How to Identify Old or Bad Gasoline
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There are a few different ways to tell if gas has gone bad. One way is to smell it – if it smells like varnish or paint, it’s probably bad.

Another way to tell is by looking at the color – if the gas is dark brown or black, it’s time to get rid of it.

Finally, you can also check the expiration date on the container. If the gas is more than six months old, it’s best to dispose of it.

Can You Dump It Down the Drain?

Please don’t do it. A single gallon of gas down the drain can pollute 250,000 gallons of drinking water and is strictly prohibited in many nations, meaning you could be fined heavily.

You wouldn’t want to throw away batteries in the garbage, would you? The same thing applies to gasoline. At all costs, don’t toss any gas into the rubbish.

This poses a fire risk as you go down the waste disposal line, and it could severely hurt someone in charge of disposing of the trash correctly.

How to Dispose of Old Gas

Now that we know how important it is to dispose of old gas let’s talk about how to dispose of it safely.

1. Selecting a Disposal Location

Contact your local recycling authority

Recycling companies that take gas will recycle it safely or recondition it. Your city’s government officials should be able to point you in the correct direction for recycling.

Then, call the recycling facility ahead of time to find out if they have any special requirements you must adhere to.

Take it to a hazardous waste disposal center

This is not the same as recycling since your gas would generally be thrown away rather than reused. You can still contact your local government administration to inquire about a waste disposal site in your area.

Find out if there are any limitations, such as hours of operation and what they’ll take. Some hazardous waste disposal locations charge only residents from a certain region, while visitors must pay a fee for disposal.

In less densely populated regions, your local waste disposal facility may only be open for a few hours daily. This is another reason to contact ahead of time.

Centers also have a maximum amount of gas they will take in one visit or from one customer over a specific time.

Pay for a disposal service

If you have a large amount of gas to dispose of or no other options in your region, you may need to hire a private disposal service.

Look for one of these businesses by entering “private hazardous waste disposal” and your address into a search engine. When you call, inquire about their costs.

These services can be pricey, but they are far less expensive than paying the penalty for illegal dumping.

Attend a community collection event

Many cities organize recycling and disposal events to encourage individuals to dispose of waste responsibly.

They usually post a list of the specifics and permitted materials, such as gas, ahead of time. Reach your local government to find out whether this is an option.

2. Handling the Gas for Disposal

Transfer the gas to an approved container

If you’re transporting gas for disposal, ensure it’s in an airtight container to keep it safe. Most plastic or metal gasoline cans, especially the 5-gallon sizes, are made specifically for secure and quick fuel transportation.

Before transporting them, funnel your old gas into these containers and seal them tightly.

Set the containers in a bin

Place your gas containers inside a large plastic tub or bin to prevent them from tipping while driving.

This will keep your vehicle clean and decrease the chance of getting gasoline on your skin. When you’ve finished using the containers, empty the bin with water.

Leave your containers behind or carefully pour the gas out

When you go to a disposal facility, they may need to take your containers and the gas.

This implies you’ll have to pay for the containers again, but you’ll avoid getting fined. They could have a huge tank into which you can pour gasoline to keep your cans.

3. Using Old Gas Instead

Pour some in a glass to check its quality

Get a glass mason jar or some other transparent container. Fill the glass portion halfway with gas using a funnel. Swirl the glass to see whether any sediment accumulates at the bottom.

Examine the color of the gas to determine if it is darker than usual. Also, pay attention to whether there is an especially bad, rotten-egg smell from the gas.

These all indicate that the gas has gone bad and should not be reconditioned. Getting rid of damaged gas is critical because it can clog machine fuel lines and cause other issues, even if diluted.

Do not use a drinking glass, as the results will be invalidated. The glass you employ should be used exclusively for gas testing.

Recondition your gasoline

Fill a container with water and place a funnel with a coffee filter at the bottom into the top. Pour your old gasoline carefully into the funnel.

The filter will catch any particles. Then, you may fill your lawn equipment or automobile with it. Combine 1 part old gas with at least 5 parts new gas to make up 5 gallons (19 L).

If you don’t have a coffee filter, try using two pieces of thin cloth instead. Slowly pour the gas into the funnel’s center, draping the cloth over it and pushing it in gradually.

Fill up an outdoor device with it

If you have good but old gas, recondition it and use it in lawn equipment. It will still fire an engine; be aware that this mixed gas tank will be less efficient than before.

Mix it with fresh gas in your car

You can also add pre-filtered (but not mixed) gas straight to your tank using a “jerry can” (a gas container with an angled spout). For a tank that holds 9–10 gallons (34.1–37.9 L), you can safely add a half gallon at a time until the tank is full.

When filling a tank that holds 11 or more gallons, you may use intervals of ¾ gallon until full. You should check the metal safety valve in your gasoline tank to determine when it is full.

Pour in a fuel additive

Adding a fuel additive into your tank or the old gas canister is a good idea. The additive may aid in the breakdown of any hazardous chemicals found in previous gas.

Before doing this, double-check with your owner’s handbook or consult with a mechanic since it’s not advised for all engine types.

Safety Tips When Dealing with Gas

Because gasoline is highly toxic and explosive, be careful while handling and removing it.

  • Do not smoke while handling gas.
  • If you spill gasoline on your skin, wash it off immediately with soap and water.
  • Avoid using old gas in high-powered vehicles or engines.
  • Do not store gasoline near heat sources, such as a stove.
  • Never pour gasoline down the drain. Doing so could contaminate the water supply.


Proper disposal of old gas is important to avoid accidents or contamination.

Be sure to follow the safety tips listed above and always consult with a professional if you’re unsure about how to proceed. Thanks for reading!


Can you mix old gas with new gas?

Yes, you can mix old gas with new gas. However, it’s important to understand that the quality of the gas will be diminished. Following proper safety procedures when handling and storing gasoline is also important.

Can you let old gas evaporate?

No, you should not simply let old gas evaporate. Gasoline is highly flammable and can be dangerous if not handled properly. If you need to dispose of old gas, follow the proper safety procedures.

Can old gasoline be rejuvenated?

Yes, old gasoline can be rejuvenated. However, it’s important to understand that the quality of the gas will be diminished. Following proper safety procedures when handling and storing gasoline is also important.

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