Yes, Gumout All-In-One Diesel Complete Fuel System Cleaner works safely in all diesel engines, from vehicles to heavy machinery.

Gumout All-In-One Diesel Complete Fuel System Cleaner is best used after every oil change as a part of your vehicle’s maintenance schedule. If you live in below freezing temperatures, you may wish to use it more frequently to avoid fuel gelling issues.

Gumout® All-In-One Diesel Complete Fuel System Cleaner contains a robust nitrogen-based detergent called Nitro-D Power Detergent. Nitro-D is the most powerful detergent across the diesel additive market, reliable and proven for the deepest diesel fuel system cleaning of all components.  It will also boost power, improve fuel economy, and reduce emissions.

Yes.

Use 8 ounces of Gumout All-In-One Diesel Complete Fuel System Cleaner to treat 20 gallons. Use 16 ounces to treat 40 gallons. Use 32 ounces (one full bottle) to treat 80 gallons/302 liters.

We recommend using a clean 8 oz cup – one 8 oz cup treats 20 gallons, two 8 oz cups (16 oz) treat 40 gallons, four 8 oz cups (32 oz) treats 80 gallons (302 liters).  Throw away the cup properly after usage.

No issues.  Using additional ounces of the product will not harm the engine.

Gumout All-In-One Diesel Complete Fuel System Cleaner has been compared to several diesel additive products on the market. Most diesel additive products only deliver limited performance features. For example:

1. Power Service Diesel Fuel Supplement 16 oz only provides anti-gelling, cetane, and detergency.
2. Power Service Diesel Fuel Supplement Plus Cetane 16 oz only provides anti-gelling, cetane, and detergency.
3. Power Service Diesel Kleen Plus Cetane 16 oz only provides cetane, detergency, and lubricity.
4. Lucas Fuel Treatment and Injector Cleaner 5.25 oz only provides detergency and lubricity.

Gumout All-In-One Diesel is a complete Diesel Fuel System Treatment crafted to fight against Diesel engine rough running and to restore the lost power and engine performance.

No, Gumout All-In-One Diesel Complete Fuel System Cleaner is an all-season, multifunctional, diesel fuel additives.

Gumout All-In-One Diesel Complete Fuel System Cleaner is a multifunctional diesel fuel additive that cleans the entire diesel fuel system, not just injectors like other diesel additives. For example, it will also clean fuel pumps and high pressure pumps. The product improves fuel economy, improves cold starting, restores power, prevents gelling, boosts cetane, fixes existing gelling, prevents fuel pump water, increases lubricity, helps stop fuel-filter icing, removes water, reduces emissions, prevents filter plugging, and prevents corrosion. It truly is All-In-One!

Cetane is the fuel property that is an inverse function to reduce fuel ignition delay.  A fuel treated with Gumout All-In-One Diesel, which contains a good cetane Improver additive, will have a higher cetane number and will perform shorter ignition delay.  The benefits include lowering exhaust emissions, reducing noise, and reducing white smoke at start up.

Lubricity is the fuel property that lubricates the fuel injector and fuel pump to prevent wear in the diesel delivery system. A fuel treated with Gumout All-In-One Diesel, which contains a good Lubricity Improver additive, will have higher lubricity performance.

When cold, diesel fuel wax crystals can accumulate on fuel filters and restrict fuel flow and promote fuel starvation.  That will result in a loss of power, engine stalling, and the inability to restart. A fuel treated with Gumout All-In-One Diesel, which contains a good Cold Flow Improver additive, will have the capability to fight against these cold weather issues by inhibiting the growth of fuel wax crystals, improving fuel cold flow in the fuel delivery system, and fixing these cold weather issues.

It does not matter.  Just follow the treat rate in the Direction:  Use 8 ounces of Gumout All-In-One Diesel Complete Fuel System Cleaner to treat 20 gallons. Use 16 ounces to treat 40 gallons. Use 32 ounces (one full bottle) to treat 80 gallons/302 liters.

Yes, it does, up to B20.

Use 8 ounces of Gumout All-In-One Diesel Complete Fuel System Cleaner to treat 20 gallons. Use 16ounces to treat 40 gallons. Use 32 ounces (one full bottle) to treat 80 gallons/302 liters.

Yes, you can use Carb/Choke & Parts Cleaner to clean any metal parts. There won't 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 of them.

Level 3

Use Gumout 2-Cycle Oil at the treat rate recommended by the engine manufacturer. Add it 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.

No. Gumout DOT 3 Break Fluid can only be used in vehicles that call for DOT 3 fluid (the most common type). 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.

Gumout is safe for both copper fuel lines and neoprene diaphragms when diluted in fuel. If dirt and grease has entered the fuel line use the new Gumout^® Regane Auto Parts Cleaner Degreaser aerosol which has a straw that can reach deep into the lines. If that is not available use Gumout^® Jet Spray Carburetor Cleaner. Beginning with the first tank of gas add a high quality fuel system additive to clean areas the spray may not have reached.

Isopropyl alcohol will pull water into the fuel so it is burned with the gasoline. However, this type of product works when the engine is used continuously. If not, use a product that can offer fuel stability (gum and varnish prevention) and rust and corrosion protection. This is critical for long term storage.

All Gumout products are compatible with standard OEM fuel tank components. However, specialty aftermarket or racing components should be tested by the manufacturer. In general if the component is compatible with pump gasoline, it will be compatible with gasoline treated with Gumout^® .

If E85 is run in the vehicle the Gumout^® product to use is Multi-System Tune-Up. It is designed to be soluble in the high alcohol content of E85. Most other gasoline additives (including Gumout^® ) are not completely soluble in E85 and may separate from the fuel.

For E0-E10 run any of the Gumout^® products. For E85 use Gumout^® Multi-System Tune-Up.

No, our products will not remove ethanol from the fuel. We are not aware of any fuel additive that can do this, but many of our products can protect your engine from rust and corrosion caused by phase separation.

We recommend filling the tank with fresh fuel before storage to displace the air. The tank will still breathe slightly, but the water incursion will be very small. Before filling the tank add Gumout® Multi-System Tune-Up to prevent fuel oxidation (gum and varnish) and corrosion protection (rust and pitting). Run the vehicle to deliver treated fuel to the fuel line and carburetor so these areas are stored in contact with the protective chemistry. Multi-System Tune-Up is an excellent fuel stabilizer.

Water can condensate in fuel tanks at the station and in your vehicle – the more hot and humid the climate the more this will happen. If the fuel doesn’t sit for an extended period of time the ethanol will pull in water where it will be burned up in the combustion process, but when fuel sits, phase separation can set in. If you are constantly running fuel through your system and not letting the vehicle/motorcycle sit, your risk of ethanol/water damage will be low. If you do let it sit, we recommend our Regane, High Mileage Regane and All in One products because they contain rust and corrosion inhibitors that protect against this issue even if water is present in the fuel and our multi-system tune-up product takes it a step

If you are referring to the impact of using one of our products that can fight the damaging effects of ethanol, then you probably won’t see a distinguishable difference because in your instance the fuel doesn’t sit long enough to allow phase separation to begin. However, if you are referring to the difference in performance tied to carbon deposit build up, then there are two ways to look at this: 1. all gasolines are going to leave behind deposits including top tier. If you haven’t used a high quality fuel additive before and then use one, you will most likely see a difference in increased MPG and acceleration, reduced hesitation, surging and knocking/pinging. A complete fuel system cleaner with a potent detergent such as polyetheamine (P.E.A.) is going to do a better job of cleaning than a lower level of detergent typically found in a fuel injector cleaner. The lower the level the less you will be able to tell a difference. 2. By using a high quality fuel system cleaner as part of your regular maintenance you keep build up from happening in the first place which would keep your performance from dropping off. You could still see an improvement in gas mileage by using one of our products that has a friction modifier in it. All in One complete fuel system cleaner has the highest level of friction modifier in it, followed by high mileage Regane and then our Multi-System Tune-Up. By reducing friction the pistons move more freely which equates to the engine running more efficiently. Think of it like jogging in mud vs on a hard surface – you have to work harder to get through the mud, which tires you out more than running on a hard surface.

Yes, keep fresh fuel and Regane in the tank for the next several fill-ups. The Polyetheramine (PEA) detergent in Regane® will help clean-up any deposits or contamination from the fuel and help remove any carbon that may have resulted from the incomplete combustion of the diesel fuel.

The high alcohol level in flex fuel pulls the water into the fuel and holds it tightly. Pure alcohol and water will mix to form a clear uniform solution in all concentrations. North American fuels contain only about 10% alcohol, so most of the fuel is hydrocarbon. A small amount of water will mix clearly into the alcohol and be held within the fuel, but as the water percentage increases, the alcohol-water mixture becomes less soluble in the fuel and forms a separate layer.

Probably not but in hot, humid coastal climates phase separation can begin within a week. If you are constantly driving the vehicle though, the risk is very low.

No. When used as directed, Gumout fuel additives will not degrade or harm oxygen sensors, catalytic converters, hoses, fuel lines or fuel level sensors.

All Gumout fuel additives include specific directions for use. But each product has also undergone rigorous "no harm" testing and can be used as often as every fill-up. Our usage recommendations for each product are based on testing in a number of different vehicle types, though the benefits in your vehicle may vary. For best results, use these products at least as often as recommended on the package label.

The treatment rates vary depending on the product. All additives have directions on the back label. They may also be used in about the same proportions in smaller fuel tanks. However, any additive added to 2-cycle fuel is treating the gasoline, not replacing the oil. Add the full amount of oil recommended by the engine manufacturer. For clarification or technical assistance, call 1-855-888-1990.

Using Gumout fuel additives when your tank is nearly empty facilitates better mixing with the fuel and allows you to get the most from the product chemistry due to longer use at the recommended concentration. If you use a Gumout fuel additive when your tank is full, it will just take longer for the additive to mix thoroughly with your fuel.

While we recommend using our fuel additives as directed, each product has been through rigorous “no harm” testing and may be used as often as every tankful. However, a stronger concentration of the product may not provide any additional performance benefit over the recommended dosage.

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 4 years.

Yes.

Gumout Multi-System Tune-Up is recommended for use in all types of 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 five gallons, use 1.5 oz – or ¼ of the bottle. The rest may be saved for later use or added to a car or truck fuel tank to treat about 15 gallons.

Gumout Multi-System Tune-Up is recommended for use in all types of engines. But other Gumout fuel additives can also be used in these engines. The treat rate should be ½ oz of Gumout product per gallon of fuel.

Gumout offers two products recommended for use in diesel engines: Diesel Fuel Treatment and Multi-System Tune-Up (formulated for use in gas, ethanol and diesel).

While most Gumout fuel additives are not recommended for vehicles designed to use E-85 fuel, Gumout Multi-System is recommended for use in flexible fuel vehicles. It is specifically formulated to work with all types of engines, including gas, ethanol and diesel.

No.

Gumout fuel additives are not recommended for use as a parts-cleaning solution. However, Gumout offers a line of maintenance aerosol products for cleaning specific parts of an engine or car and other nonpainted metal surfaces. See specific use instructions on each product.

Yes, Gumout Multi-System Tune-Up is formulated for use in all types of engine, including including gas, ethanol and diesel. Gumout additives do not replace the oil used in 2-cycle fuel and Gumout 2-Cycle Oil (or another specified oil) must also be added at the recommended level.

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

Yes. Carburetor deposits are typically easier to clean than fuel injector deposits, and the chemistry used in the fuel injector cleaner will also effectively clean carburetors.

10 octane points = 1 octane level at the gas pump. Gumout Octane Booster increases the octane of fuel by 8 points or by 0.8 levels. Although this may vary depending on the amount of fuel treated and the source of the gasoline itself.