Gumout® FAQ'S

Will Gumout® Fuel Additives harm oxygen sensors, catalytic converters, hoses, fuel lines or fuel level sensors?

No, when used as directed, Gumout® Fuel Additives will not degrade or harm oxygen sensors, catalytic converters, hoses, fuel lines or fuel level sensors.

How often should I use Gumout® Fuel Additives?

While all Gumout® Fuel Additive products include directions for use and a recommended usage interval, each product has also been through rigorous "no harm" testing and can be used as often as every tankful of fuel. Products recommended for use in every tank should be used every tank as indicated on the label. The performance benefits of products recommended for use in extended intervals will diminish with each subsequent un-treated tank of fuel to a point where a re-treatment may be required again. Our usage recommendations on these products are based on testing in numerous vehicle types. The benefits in your vehicle may vary. For best results, use these products at least as often as recommended on package label.

Are Gumout® Fuel Additives recommended for use in 2-stroke engines??

We do offer a 2-stroke specific product. Gumout® Small Engine Gas Treatment is recommended for use in all 2-stroke engines.  Other Gumout® fuel additives may be used at the recommended dilution rate in the gasoline.  For example, the 6-oz. Regane Complete Fuel System Cleaner treats 21 gallons.  To treat five gallons use 1½ ounces or ¼ bottle.  The rest may be saved for later use or added to a car or truck fuel tank to treat about 15 gallons.

Are Gumout® Fuel Additives recommended for use in small 4-stroke engines typically found in motorcycles, ATVs, lawn mowers, power equipment, and other like applications?

Yes, you may use any of the Gumout® Fuel Additives in these engines. The treat rate should be 1 ounce of Gumout® product per gallon of fuel.

Are Gumout® Fuel Additives recommended for use in diesel engines?

Gumout® offers Diesel fuel specific products for use in Diesel engines.

Can I clean parts with Gumout® Fuel Additives or use it as a parts cleaning solution?

Gumout® Fuel Additives are not recommended for use as parts cleaning solution. However, Gumout® offers a line of maintenance aerosol products for cleaning specific parts of an engine or car. See specific use instructions on each product.

Why do I have to put Gumout® Fuel Additives into the fuel on a nearly empty tank?

You don't, but for best results and to facilitate better mixing with your fuel, we recommend you add to a nearly empty tank, fill the tank, and then do not fill again until nearly empty. This will allow you to get the most benefit from the product chemistry due to longer use at the recommended effective concentration.

What's the difference in Fuel Injector Cleaner and Fuel System Cleaner?

Fuel Injector Cleaners are designed to clean through the fuel injector system including intake valves and ports and Fuel System Cleaners not only clean these parts but go beyond, to help remove deposits from pistons tops, cylinder heads and combustion chambers.

Can I double the amount of Gumout® Fuel Additive suggested on the label?

While we do not recommend use other than directed on the product label, each product has been through rigorous "no harm" testing and may be used as often as every tankful. However, a stronger concentration of product may not provide any additional performance benefit over the recommended dosage.

What happens if I put the Gumout® into a full tank of gas instead of a nearly empty tank?

It takes a little longer for the additive to mix thoroughly with your fuel. While there would be no negative effects, to get optimum results, the product should be thoroughly mixed with your fuel. This is accomplished more efficiently by filling a nearly empty tank.

Can I use Gumout® Fuel Additives in a vehicle designed to use E-85 fuel?

While most Gumout® Fuel Additives are not recommended for use in a vehicle designed to use E-85 fuel, Gumout® does offer an E-85 specific product. Gumout® Ethanol treatment is recommended for use in flexible fuel vehicles. It is specifically formulated to work with BOTH traditional gasoline and ethanol blended gasolines (E-10 to E-85).

Can I use the Gumout® Fuel Injector Cleaner in an engine with a carburetor?

Yes, carburetor deposits are typically easier to clean than those found in fuel injectors and the chemistry used in the Injector Cleaner products will also effectively clean carburetors. Gumout® Fuel Injector/Carburetor Cleaner is also recommended for use in an engine with a carburetor.

How many points does the Octane Boost increase the octane rating?

10 Octane points = 1 Octane level. Octane level is what gasoline how gasoline is rated, for example, 87, 89, 91, 93. The Gumout Octane Booster increases octane points by 8 points or .8 Octane level, although this may vary depending on the amount of fuel treated and the source of the gasoline itself.

I accidently put Gumout® Diesel in my gasoline tank.  Will it harm the engine?


I have old product sitting on a shelf for many years.  Is the product still usable?

Most of our products are intended to be used within 1-2 years.  We cannot guarantee the performance of our chemical products if older than 2 years.

Is Gumout® good for Turbo or Super Charged engines?


What hazardous level is Gumout® Carb & Choke Cleaner Jet Spray?

Level 3.

Can any Gumout® product be used in boats.

Yes, treat the gasoline at the treat rate recommended on the bottle. Gumout® additives do not replace the oil used in 2-cycle fuel and Gumout® 2-Cycle Oil (or other specified oil) must also be added at the recommended level. 

Should all of Gumout® All-In-One be used in my tank and can it be used for any car?

Yes, one bottle can be used in any gasoline tank up to 35 gallons.

How should I mix Gumout® 2-Cycle Oil?

Use at the treat rate recommended by the engine manufacturer.  Add to gasoline and mix until uniform before starting the engine.  Usually adding the oil to the tank before pumping in the gasoline will mix it adequately.

Is there a minimum of how many gallons Gumout® Fuel Additives treat?

For our 6 oz products, use an entire bottle to treat up to 21 gallons. For our larger 10 oz products use an entire bottle to treat up to 35 gallons.  For smaller tanks use proportionately less.  For example, use ¼ to ½ bottle to treat 5 gallons.

Can Gumout® Break Fluid - DOT3 be used in ALL Vehicles?

No.  Gumout® Brake Fluid is DOT 3 fluid, the most common type and can be used in any vehicle requiring DOT 3 Fluid.  This is generally specified in the owner’s manual and on a sticker or label under the hood for the particular vehicle.  The proper fluid must be used as specified.

Can you use the Gumout® carb & choke cleaner to clean the power value of a rebuilt 2-cycle motorcycle?  Also is it safe for Aluminum, as this has some aluminum parts.

Yes, you can use GO Carb & Choke to clean any metal parts.  There will not be any compatibility problems.  To be safe, it should be kept away from plastic or painted surfaces.  Most will be OK, but not necessarily all.

Do you offer cash sponsorships for social clubs, youth groups, sports/racing teams, etc.?

Unfortunately, we are not accepting sponsorship proposals at this time.

How does each of the Gumout® products differ in performance?

Please review the attached Customized Cleaning Matrix. 

Cleaner Guide Matrix

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