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Does Stabil Fuel Additive Go Bad?

STA-BIL fuel stabilizer is a go-to product for vehicle owners who want to extend the life of their fuel. But if you buy a bottle, how long does it last before it goes bad? Finally, we've got the answer.

An unopened bottle of STA-BIL fuel additive will last five years from the date of manufacture. An opened bottle will last two years in proper environmental storage conditions. If there is sediment or flakes in the bottle, do not use the product.

Using STA-BIL will help to keep your fuel fresh while your vehicle is in storage. In this article, we will discuss the shelf life of STA-BIL, how to store it and how to use it. In addition, we will answer other frequently asked questions about fuel additives, so let's get to it!

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Open gas tank with stabilizer fuel additive being put in before storage - Does Stabil Fuel Additive Go Bad

How long does STA-BIL Fuel Additive last?

STA-BIL is a fuel additive that helps to keep fuel fresh while your vehicle is in storage. However, if you purchased extra bottles or have an old bottle that you found in the garage, you may wonder how long it will last before it goes bad.

An STA-BIL fuel additive has a shelf life of five years from the date of manufacture if the bottle is unopened. Once opened, the STA-BIL will last for two years as long as the cap is tightened and the bottle is stored in a cool, dry place.

Do not use the product if you notice any sediment or flakes in the bottle. STA-BIL should be a clear liquid. You should also use the opened bottle sooner rather than later to ensure that the product is effective.

To extend the shelf life of an opened bottle of STA-BIL, you can store it in the refrigerator. This will help to keep the STA-BIL fresh and extend its shelf life by several months.

If you are unsure how old your bottle of STA-BIL is, check the date code on the bottom of the bottle. The first two numbers will tell you the year, and the last two numbers will tell you what day of the year it was manufactured.

For example, the first five numbers of code 16104 mean that the STA-BIL was manufactured on the 104th day of 2016. Now that you know how long STA-BIL lasts let's discuss how to use it.

Male employee is adding diesel fuel additive to diesel tank. Increase combustion effciency.

How to Use STA-BIL Fuel Additive

The STA-BIL fuel additive is easy to use. Add the recommended amount of STA-BIL to your gas tank before you fill it up with gas. The directions are listed on the bottle.

Typically one ounce of STA-BIL fuel stabilizer will treat 2.5 gallons [9.5 L] of gasoline. However, it is recommended to have your gas tank 95% full to avoid condensation.

In addition, it has to be fresh fuel in the tank for STA-BIL to work. Therefore, after adding STA-BIL to your tank, you should let the vehicle run for at least 10 minutes to circulate the additive throughout the fuel system.

By doing this, you will prevent deposits from forming and help extend the life of your fuel. STA-BIL fuel stabilizer will protect your engine for up to 12-24 months.

Should you use STA-BIL in Your Vehicle?

STA-BIL is an excellent fuel additive to use if you want to extend the life of your fuel. It is easy to use and only requires that you add it to your gas tank before you fill it up with gas.

In addition, STA-BIL will help keep your engine clean and prevent deposits from forming. It is a great choice for those who want to protect their investment and extend the life of their vehicle.

You should use it if you plan on storing or not driving your vehicle for an extended period of time. The reason is that fuel degrades over time, and STA-BIL will help keep the fuel fresh.

How Often Should You Use STA-BIL?

Depending on what you are using it for, you may only need to use STA-BIL once a year or once every few months. However, if you are storing your vehicle for an extended period of time, it is recommended to use STA-BIL before you fill up your gas tank.

In addition, if the gas stations you use have ethanol in their gas, it is recommended to use STA-BIL every time you fill up your tank. Ethanol can cause damage to your fuel system, and STA-BIL will help prevent this damage from occurring.

It is recommended to use it every time you fill up your gas tank for marine engines. This will help to keep your engine clean and prevent corrosion from occurring.

No matter how often you use STA-BIL, it is essential to follow the directions on the bottle. This will ensure that you use the product correctly and get the most out of it.

Gas station with diesel and unleaded pumps

Can you over-treat with STA-BIL?

Putting too much STA-BIL in your gas tank will not hurt your engine. However, you will not get any additional benefits from using more than the recommended amount.

Don't put in more than four times the recommended amount. If you do, it is a good idea to dilute the fuel. Plus, it is a waste of the product and your money.

If you have any questions about how to use STA-BIL, you can contact the company directly. They will be more than happy to answer any questions you may have.

Does STA-BIL work for diesel engines?

STA-BIL makes a fuel additive specifically for diesel engines. It is called STA-BIL Diesel Formula for every fill-up.

This product will help keep your diesel engine clean and prevent corrosion. You can use the STA-BIL diesel for every fill-up or for storage pre-treatments.

The STA-BIL diesel formula is compatible with all types of diesel engines, including turbocharged ones. In addition, it can be used for Ultra Low Sulfur Deisel [ULSD] engines.

To use the STA-BIL diesel formula, add it to your fuel tank before filling it with diesel. The directions are listed on the bottle.

a driver fills a diesel additive into a car's diesel fuel tank to increase the cetane number and lower the sulfur content of biodiesel

Can I use other additives with STA-BIL?

Yes, you can use other additives with STA-BIL. However, reading the labels carefully and following the directions is essential.

However, STA-BIL is budget-friendly and a potent product, so you may not need to use any other additives.

Nonetheless, it doesn't hurt to do your research and see what other products are available. Just remember to use STA-BIL as directed for the best results.

Is it better to drain gas or use STA-BIL?

The best way to store fuel is to use an STA-BIL product. This is because fuel degrades over time, and STA-BIL will help to keep the fuel fresh.

If you don't have an STA-BIL product, you are taking the risk of the fuel degrading. This can cause damage to your engine and cost you money in the long run.

Also, draining the gas from your tank can be messy and time-consuming. Using STA-BIL and simply adding it to your fuel tank is much easier.

No matter what you do, it is important to take care of your vehicle. This includes using the right products, such as STA-BIL, to keep your engine running smoothly.

What else can put STA-BIL in?

STA-BIL can also be used for lawnmowers, snowblowers, snowmobiles, and other small engines. Add the product to the gas tank and follow the directions on the bottle.

Since these types of engines are stored for extended periods of time, it is important to use an STA-BIL product. This will help to keep the engine clean and prevent corrosion from occurring.

Red and Black Lawn Mower in the Spring With Shed in the Backyard

Should you add fuel additives after storage?

This depends on the type of additive that you are using. For example, if you use STA-BIL, you should add it to the fuel tank before storing the engine.

However, if you didn't add the STA-BIL before storing the engine, you can add it afterward. Just be sure to follow the directions on the bottle.

Then let the vehicle run for a few minutes so the additive can circulate through the engine.

It is always better to add an STA-BIL product before storing your vehicle. This will help to keep the fuel fresh and prevent damage from occurring.

Final Thoughts

By following these tips, you can ensure that your vehicle is always ready to go, no matter how long it has been sitting.

STA-BIL products are available at most auto parts stores and online. You can also purchase them directly from the STA-BIL website.

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