Does Fuel Stabilizer Work

Using A Fuel Stabilizer To Extend Life of Gas

Does Fuel Stabilizer Work | PRI-G Fuel Stabilizer

If you own a gas power tool that has been stored for some time with gas in it, you probably experienced some engine starting problems when trying to crank it. Gasoline over time gets old or stale and some of its properties breakdown causing some gum and carbon deposits to build-up causing the gas to get stale and goes into the carburetor causing starting failures. Does fuel stabilizer work when added into the fuel tank? The answer is absolutely yes.

You just wont believe it when you add the stabilizer into the fuel how it can extend its life and your gas powered tool will start every time. Not only do they keep the gas fresh longer, they also can help protect the life of the engine over time as an added bonus. Most stabilizers extend the life of gas in storage for up to one-year. The following topics that will be covered are listed below.

Just click on a topic of interest and you will be directed to that section, or just scroll down to view each one.

Benefits of Adding a Gasoline Stabilizer

Does Fuel Stabilizer Work | STA-BIL Fuel Stabilizer
Sta-Bil Fuel Stabilizer

Some of the benefits of adding a gasoline stabilizer are below.

  • A small amount (about 1 oz.) treats large amounts of gasoline. Amounts of treated gas will vary with brand.
  • Some brands improve fuel economy up to 5 to 15%
  • Preserves stored fuel for up to 1-year and some more than 1-year. (See Chart)
  • Improves power output
  • Some stabilizer brands reduce HC and NOx Emissions
  • Makes engines start easier
  • Some stabilizer brands rejuvenates old fuel
  • All brands are effective with Ethanol blended gas – some better than others
  • No need to drain fuel prior to storage
  • Cleanses carburetors and fuel injectors
  • Extends the life of the engine
  • Effective in all gasoline’s

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Which Stabilizer Brand Is Best?

This may be a difficult decision to make as the top three brands have done very well over the years. All three are rated the same by Amazon customers who have purchased the products. We do have some brands to recommend. Some brands are priced higher than others. What you need to do is to compare how much product is used to treat gas and how many gallons does this amount treat.

STAR TRON Fuel Stabilizer
To help you decide on which stabilizer to use, we have provided a comparison chart so you can determine which one is best for you. They all will work and preserve fuel. Some are better in certain areas than the others. Ultimately you must make the final decision on which stabilizer brand you want to use for your gas powered tools. The five brands that are going to be compared are:

  • PRI-G

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Fuel Stabilizer Comparison Chart


Quick Shop & Compare

Fuel Stabilizer Comparison Chart

Stabilizer Brands: STA-BIL, PRI-G, Star Tron, Star Brite, Briggs & Stratton

Specifications and Features
Product STA-BIL PRI-G STAR TRON Star Brite Briggs & Statton
ASIN: B000B68V6I B005JP16TA B00D3IEIFO B00144CSWO B00D6F318E
Manufacturer: Gold Eagle Co. Power Research Inc. Star Brite Star Brite Briggs & Stratton
Cost: $17.90 $41.50 $23.63 $21.30 $29.99
Cost Per Ounce: $0.55 $2.59 $1.47 $0.66 $1.87
Product Weight: 32 Ounces 16 Ounces 16 Ounces 32 Ounces 16 Ounces
Treated Gal. Per Oz. 2.5 Gallons 16 Gallons 16 Gallons 5 Gallons 5 Gallons
Treated Gal. Per Product:
80 Gallons 256 Gallons 256 Gallons 160 Gallons 80 Gallons
*Stabilized Fuel Time: ***1-Year **1-Year 2-Years 1-Year 3-Years
Safe For All Engines: Yes Yes Yes Yes Yes
Rejuvenates Old Fuel: No Yes Yes No No
Ethanol Fuel Types: E10, E15 E10 E10, E15, & E20 E10 E10, E15
Amazon Rating: 4.8 4.8 4.8 4.9 4.4
Cleans valves, injectors,
carbon deposits,
gums & varnish
Yes Yes Yes Yes Yes
Contains Alcohol: No No No N/A N/A
Made In USA: Yes Yes Yes Yes Yes
Shelf Life – When Open: 2-Years 3-Years 2-Years 2-Years 2-Years
Recommended: Yes Yes Yes Yes Yes
Boosts Fuel Economy: No Yes Yes Yes Yes
SHOP NOW LINKS STA-BILSTA-BIL Fuel Stabilizer 32 oz. PRI-GPRI-G 16 oz. Fuel Stabilizer Star TronStar Tron Enzyme Fuel Treatment - Concentrated Gas Formula 16 oz - Treats 256 Gallons Star BriteStar Brite Fuel Stabilizer 32 oz. Briggs & StrattonBriggs & Stratton 100117 Fuel Treatment & Stabilizer Replaces 100117, 100121

Note: Chart last updated on 3-14-2020

*When stored in a cool place and out of direct sunlight.
**Fuel can keep fresh for one year with initial treatment. Fuel can stay fresh for years to come with annual treatments.
***Doubling the dosage rate of STA-BIL could prolong the storage time up to 2-years.
Note: No treated gasoline stabilizer brands can prevent some volatility loss in fuel.

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Recommended Stabilizer Rankings

If we had to rank the fuel stabilizers in order from one to five our listing is below:

1. PRI-G – Our reasoning for this ranking even though it’s the most expensive of the five, this product is good for up to three years when opened, the best of the five. You can extend the life of the fuel with annual treatments, which you cannot do with the others.

2. STAR TRON – This product is the second most expensive you get 16 gallons of treated gas per ounce which is tied for first best. It provides 2-years of fuel stabilization once placed in the tank, the second best.

3. BRIGGS & STRATTON – This product provides up to 3-years of fuel stabilization once placed in the tank. The best of the five.

4. STA-BIL – This product allows you to extend the life of the fuel by doubling the dosage rate for up to 2-years.

5. STAR BRITE – Provide Ethanol protection for E10 fuels for 1-year. Back to Does Fuel Stabilizer Work topics.


I think you can agree that all five of these products will do the job for preserving gas for up to 1-year. However, each brand has its own best options. Our recommended brand is PRI-G for the reasons stated above. The bottom line is to provide protection of fuel once placed in the tank of any gas powered tool. The tools include: lawn mowers, generators, leaf blowers, snow blowers and even the engine in your automobile. Back to Does Fuel Stabilizer Work topics.

Shop Now Links

Below are the links for reading more detail and purchasing the fuel stabilizer products.

As an Amazon associate, I earn from qualified purchases.

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