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Diesel Injector Clean


A performance concentrate that delivers maximum results


Removes performance-robbing deposits from diesel fuel injectors to restore horsepower and improve fuel economy. It is formulated for all types of diesel engines, including high-pressure common-rail designs. AMSOIL Diesel Injector Clean makes no sacrifices; it is purpose-built for diesel owners who demand maximum results.

Package sizes include:

16-oz. Bottle

64-oz. Bottle

5-Gallon Pail

55-Gallon Drum

Go directly to the online store and purchase AMSOIL fuel additive products. Call 1-800-717-1308 for special prices and discounts.

Check out "An Introduction to Diesel Fuel" to learn more about Diesel Fuel and how this product will benefit your vehicle's operation.

a concentrated diesel fuel additive that cleans combustion chambers, injectors, and valves and adds lubricity to low sulfur diesel fuels.


AMSOIL Diesel Injector Clean (ADF) removes performance-robbing deposits from diesel fuel injectors to restore horsepower and improve fuel economy. It is formulated for all types of diesel engines, including high-pressure common-rail designs. Diesel Injector Clean is formulated to clean both the tough-to-remove internal diesel injector deposits surfacing in modern high-pressure common-rail diesel engines and traditional carbonaceous deposits. Unlike all-in-one fuel additives that may sacrifice performance in specific areas in the name of convenience, AMSOIL Diesel Injector Clean makes no sacrifices; it is purpose-built for diesel owners who demand maximum results.


Restores Horsepower & Improves Fuel Economy

Fuel injector deposits interrupt spray patterns, causing poor fuel atomization, incomplete combustion, excessive emissions and smoke. High-pressure common-rail fuel systems are becoming commonplace as vehicle manufacturers attempt to produce more power while still meeting tightening emissions standards. In high-pressure common-rail systems, injection pressures near 30,000 psi atomize the fuel into a fine mist for more efficient combustion, yielding increased power and fuel economy while reducing emissions. To maintain these high pressures, injector assemblies are highly engineered, with clearances as tight as 1-3 microns (a human hair is typically 70-100 microns thick). Even minimal internal diesel injector deposits on the injector pintal or other components can lead to sticking and even seizure, reducing power, fuel economy and operability. Traditional additive chemistry is not designed to address these tough-to-remove deposits.


AMSOIL Diesel Injector Clean features advanced chemistry that delivers concentrated strength to target internal diesel injector deposits and traditional carbonaceous deposits, restoring horsepower and operability to like-new condition and improving fuel economy up to 4.5 percent. Acceleration is improved and, with regular use, AMSOIL Diesel Injector Clean continues to enhance performance by keeping injectors clean. The net savings on fuel can result in no additional cost of ownership.


Lubricates Fuel Pump & Injectors

Ultra-low-sulfur diesel fuel (ULSD) has significantly reduced lubricity - a critical property in controlling wear in fuel pumps and injectors. AMSOIL Diesel Injector Clean adds back the lubricity the fuel pump and injectors need, improving service life and saving time and money on maintenance costs.


    Formulated for all diesel fuel systems, including high pressure common-rail designs

    Cleans dirty injectors

    Adds lubricity to reduce fuel-pump & injector wear

    Improves fuel economy up to 4.5 percent

    Improves power & torque


Minimizes Soot-Loading

AMSOIL Diesel Injector Clean's powerful formula cleans fuel injectors and piston rings for improved combustion and better sealing. It minimizes soot generated from incomplete combustion and helps keep soot out of the crankcase, reducing soot-related wear and motor oil viscosity increase.


Separates Fuel and Water

AMSOIL Diesel Injector Clean is an alcohol-free product that protects fuel systems against water contamination. It helps prevent fuel/water emulsions so that separating filters can safely remove water before it reaches the pump and injectors, where it can cause corrosion. Water can be drained easier, ensuring drivability.


Heating Oil Improver

AMSOIL Diesel Injector Clean provides many of the same benefits in heating oil furnace applications. It provides fuel-oil storage stability, corrosion protection, fuel-oil filter longevity and its exceptional cleaning properties help keep fuel-oil nozzles clean for proper spray. AMSOIL Diesel Cold Flow Improver is recommended where fuel oil is stored outside at temperatures below 32˚F.



AMSOIL Diesel Injector Clean is recommended for use with all types of heavy- and light-duty, on- or off-road and marine diesel engines. For initial use, follow the Clean-Up recommendation; use Maintenance dose for regular treatment. Use with every tank of fuel for best performance and protection against fuel pump wear, injector wear and injector deposits. Compatible with all types of exhaust emission systems, including diesel particulate filters (DPFs). Add to fuel before storage. Excellent for use with AMSOIL Diesel Cetane Boost and AMSOIL Diesel Cold Flow. This diesel fuel additive complies with the federal low sulfur content requirements for use in diesel motor vehicles and non-road engines.

initial clean up: 2 oz per 5 gallons. 1 oz for continued maintenance. 32 oz for 80 gallons initial clean up. 16 oz per 80 gallons for maint

High-Pressure Common-Rail Fuel Injector Pintal

Traditional Fuel Injector Pintal

High-Pressure Common-Rail Fuel Injector Pintal is very small and Susceptible to clogging, causing a loss in horsepower and fuel economy.
Traditional Fuel Injector Pintal is larger than HPCR injectors.

Fuel injectors in high-pressure common-rail diesel engines use smaller, highly engineered components to produce the higher fuel pressures needed for improved combustion. The tighter clearances invite internal diesel injector deposits that interfere with injector needle actuation, reducing performance. External deposits can also form on the injector nozzle (the typical trouble spot for traditional injectors). While many other fuel additives have yet to catch up to the internal diesel injector deposit problem, AMSOIL Diesel Injector Clean targets deposits wherever they form, maximizing power, fuel economy and performance in high-pressure common-rail and traditional diesel engines.


AMSOIL products are backed by a Limited Liability Warranty. For complete information visit

Diesel Injector Clean

Q & A


What is AMSOIL Diesel Injector Clean (ADF)?


Diesel Injector Clean is a concentrated diesel fuel additive that cleans combustion chambers, injectors, and valves and adds lubricity to low sulfur diesel fuels.



How does it work?


Over time, diesel engines become less efficient due to fuel injector and combustion chamber deposits causing incomplete combustion and poor fuel economy. Diesel Injector Clean cleans hard to remove deposits improving overall engine efficiency. Diesel Injector Clean also helps increase the lubricity properties that were lost with the introduction of ultra low sulfur diesel (ULSD), helping to reduce fuel pump and injector wear.



What benefits does Diesel Injector Clean provide?


Cleans fuel injectors

Extends equipment life

Lowers operating costs

Improves power and torque

Improves fuel economy up to 4.5%

Saves time and money on maintenance costs

Improves start ability

Separates water from diesel fuel

Stabilizes fuel for storage



How are deposits in high-pressure common-rail (HPCR) fuel systems different from traditional deposits?


Until 2004, carbon deposits would commonly form on the tip of the injector, disrupting the spray pattern. But these were easily removed. A new problem was created with the introduction of the HPCR fuel system and is known as internal diesel injector deposits (IDID). These deposits form inside the injector, slowing down the action of the injector or seizing it completely. These deposits are different than the typical carbon deposits found on the nozzle and cannot be removed with the same chemistry.



What is different about the chemistry in Diesel Injector Clean compared to the Diesel Concentrate?


The chemistry in Diesel Injector Clean removes both types of deposits that affect injector performance. The new formula is essential for any diesel engine with a HPCR fuel system to keep the injectors operating like new. This formula works for all older diesel engines as well.



Are there any environmental benefits?


Extends equipment life

Reduces smoke

Reduces emissions

Improves fuel economy

Alcohol free



What do emulsifiers found in some diesel fuel additives do in modern diesel engines?


Certain fuel additives have emulsifiers that surround water and carry it to the injector. This could lead to corrosion and damage to the fuel system. Diesel Injector Clean has a demulsifier that prevents a fuel/water emulsion and protects against corrosion.

Can this product be used in any diesel engine?


Yes. Diesel Injector Clean can be used in any diesel engine, and it is recommended for use in all types of heavy- and light-duty, on- and off-road and marine diesel engines.



Will using Diesel Injector Clean void engine warranties?


No. Diesel Injector Clean is tested and proven and will not void engine warranties.



Can Diesel Injector Clean be used in home heating fuel?


Yes. Diesel Injector Clean is excellent for use with heating fuels. The chemistry cleans the burner nozzle of oil burning furnaces keeping them operating like new.



What package sizes does Diesel Injector Clean come in?


Diesel Injector Clean comes in 16oz bottles, 64oz bottles, 5 gallon pails, and 55 gallon drums.

What is the treat rate?


For initial use of this fuel additive, AMSOIL recommends following the Clean-Up dosage for the first fuel tank. The maintenance dosage should then be followed for all subsequent tanks of fuel.

initial clean up treat rate dosage, maintenance treat rate to gallons ratio