Defend Your Diesel
AMSOIL Diesel Injector Clean + Cetane Boost
- Cleans dirty injectors
- Lubricates pumps and injectors to reduce wear.
- Increases cetane up to 8 points.
- Extends fuel-filter life.
- Improves fuel economy up to 8%.
- Combats fuel-system corrosion.
- Delivers maximum horsepower.
- Safe for use in all diesel fuels, including biodiesel.
- Alcohol-free.
Package sizes include:
- 8oz bottle
- 16oz bottle
- 64oz bottle
- 5-gallon pail
- 55-gallon drum
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 can be 30,000 psi and higher to 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 + Cetane Boost features advanced chemistry that delivers concentrated strength to target internal diesel injector deposits and traditional carbonaceous deposits, helping to restore horsepower and operability to like-new condition. Acceleration is improved and, with regular use, Diesel Injector Clean + Cetane Boost continues to enhance performance by keeping injectors clean. The net savings on fuel can result in no additional cost of ownership.
Lubricates Pumps & Injectors to Reduce Wear
Ultra-low-sulfur diesel fuel (ULSD) provides significantly reduced lubricity – a critical property in controlling wear in fuel pumps and injectors. AMSOIL Diesel Injector Clean + Cetane Boost adds back the lubricity the fuel pump and injectors need, reducing wear, improving service life and saving time and money on maintenance costs.
Improves Fuel Quality for Peak Performance
Fuel with a higher cetane number provides for a more complete burn, resulting in improved performance. By increasing cetane, AMSOIL Diesel Injector Clean + Cetane Boost improves the ignition quality of diesel fuel, maximizing available power and improving starting. It also smooths idle and reduces smoke and emissions.
Lubricity Improvement
(The lower the number, the better.)

The ASTM D975 diesel fuel standard specifies a wear scar below 520 µm in ASTM D6079 testing, while the Engine Manufacturers Association (EMA) specifies a wear scar below 460 µm. Testing reveals AMSOIL Diesel Injector Clean + Cetane Boost provides significant lubricity improvement in diesel fuels found across the U.S., delivering improved wear protection. Fuels tested in 2017.

Extends Filter Life
Modern diesel engines run hot, raising the temperature of the fuel returned to the tank and causing carbonaceous deposits that collect in the fuel filter (see picture), plugging it and causing premature failure issues. AMSOIL Diesel Injector Clean + Cetane Boost effectively protects against deposits, extending fuel filter life.
Recommendations
Use AMSOIL Diesel Injector Clean + Cetane Boost in all types of heavy- and light-duty, on- or off-road and marine diesel engines. Add before filling tank. Initial use: follow clean-up recommendation. Subsequent uses/regular treatment: follow maintenance recommendation. To prevent cold-weather fuel issues, add AMSOIL Diesel Cold Flow or switch to AMSOIL Diesel All-In-One.
| Use this treat rate chart for the 16-oz., 64-oz. and larger package sizes of AMSOIL Diesel Injector Clean + Cetane Boost | ||
| CLEAN-UP | MAINTENANCE | FUEL VOLUME |
| 2 oz. of additive
8-point cetane increase |
1 oz. of additive
4-point cetane increase |
5 gal. |
| Use this treat rate chart for the 8-oz. size of AMSOIL Diesel Injector Clean + Cetane Boost | ||
| CLEAN-UP | MAINTENANCE | FUEL VOLUME |
| 2 Bottles
8-point cetane increase |
1 Bottle
4-point cetane increase |
Up to 20 gal. |
High-Pressure Common-Rail Fuel Injector Pintal

Traditional Fuel Injector Pintal

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 + Cetane Boost targets deposits wherever they form, maximizing power, fuel economy and performance in high-pressure common rail and traditional diesel engines.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). For a copy of the SDS sheet, click here
PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. AMSOIL products are backed by a Limited Liability Warranty. For a copy of the product warranty, click here.








