AR6400-D Diesel Fuel System Cleaner
AR6400-D Diesel Fuel System Cleaner
AR6400-D Diesel Fuel System Cleaner
AR6400-D Diesel Fuel System Cleaner
AR6400-D Diesel Fuel System Cleaner

AR6400-D Diesel Fuel System Cleaner

Sale price$24.95
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Don't wait until your fuel system is clogged and failing. Pour our highly-concentrated, one-tank treatment into your tank to experience restored power, performance and fuel economy.

✅ Restores power, performance and fuel economy (MPG +7% in testing)
✅ Rapidly cleans injector tips and internal diesel injector deposits
✅ Removes carbon and restores turbo function
✅ Eliminates DPF build-up and reduce regens
✅ Improves combustion to reduce carbon, soot and particulate exhaust emissions

One 12 oz bottle of AR6400-D treats 40 gallons of diesel fuel. Use every 5,000 miles or as required.

Why Do I Need A Fuel System Cleaner?

Improved fuel efficiency - AR6400-D improves fuel efficiency and economy by removing deposits and build-up in the fuel system, allowing for better fuel flow and combustion. This leads to lower fuel costs.

Enhanced engine performance - AR6400-D also restores engine power and performance, reducing engine noise and promoting smoother acceleration and idling.

Preventive maintenance - Regular use of AR6400-D can prevent future problems in the fuel system, such as clogged injectors and heavy carbon deposits in the DPF.

Cost-effective - Instead of waiting for fuel system components to fail, use AR6400-D to prevent premature failure and avoid expensive repairs. Use of AR6400-D extends the life of the engine.

Rapidly Restore Performance and MPG

Diesel from the pump typically contains little or no detergents which allows deposits to build and negatively affect the key fuel system components including injectors, turbos and DPFs. This leads to:

  • Rough idling
  • Poor fuel economy
  • Black smoke
  • Difficulty starting
  • Engine misfires
  • Increased emissions

AR6400-D contains a powerful dose of detergents for a one-tank treatment which rapidly cleans heavy deposits and restores power, performance and fuel economy. In testing, AR6400-D achieved a 7% improvement in MPG.

Over the last decade, Archoil has become one of the leading brands for diesel owners with over 10,000 five-star reviews. Our customers include hundreds of mechanics across North America, businesses with fleets that rely on our products to stay on the road and the head mechanic at one of the most expensive collections in the world - Jay Leno's Garage.

We know your vehicle is one of the most important investments you can make and that's why we make our premium products available direct to consumer. We believe everyone should have access to highly-concentrated, no-filler, professional-grade products developed to address and eliminate issues caused by poor quality fuel.


• AR6400-D rapidly removes internal diesel injector deposits (IDIDs) and carbon build-up from injector tips

• AR6400-D ensures correct injector spray patterns, resulting in a more complete combustion and lower emissions for optimized performance


• AR6400-D clears the turbine and variable vanes of soot and carbon, reducing turbo lag and restoring boost

• AR6400-D prevents the accumulation of carbon to reduce excess heat and wear, avoiding premature failure of the turbo


• AR6400-D improves combustion to reduce carbon, soot and particulate exhaust emissions

• AR6400-D removes soot and heavy carbon deposits from the DPF which reduces regen frequency, restores lost performance and prevents engine damage from a clogged DPF

AR6400-D FAQs

AR6400-D is suitable for all diesel vehicles, including newer systems such as High Pressure Common Rail.

AR6400-D is a highly concentrated detergent package which should be used for a rapid, deep clean of the fuel system every 5,000 miles.

We recommend using AR6500 Diesel Treatment at every fill-up between uses of AR6400-D.

AR6500 Diesel Treatment boosts cetane, improves the lubricity of fuel and contains a maintenance dose of detergents to maximize fuel system performance at every fill-up.

"Seeing this F-350 run as smooth as it did the day it left the dealership definitely made believers out of us."

"Archoil is the Real Deal"
Diesel Power Magazine

"We are seeing great results using Archoil."

"I highly recommend Archoil products"
George Swift, Mechanic, Jay Leno's Garage

"Improved fuel economy, smoother running engine and no issues with cold starts."

"We're now believers in Archoil"
Diesel Tech Magazine

Customer Reviews

Based on 314 reviews

I’m little disappointed the bottle was open when I picked up

Hello - Sorry to hear this. Please call us or reply to the email with your order confirmation and we will have a replacement shipped out. Thanks

Matt (Federal Way, WA, US)

Didn't notice much changes. Took a screenshot of injector rates and Flow prior to adding into fuel tank ran full tank out and balance rates were nearly the same after the tank of fuel, it may have quieted down the injector clatter a little. 01 chevy 2500hd duramax.

Justin M. (Gallup, NM, US)

Results are great. It increased MPG at least 2-3 . My truck I bought with 75,000 miles and had horrible gas mileage. I ordered full kit and used it. First tank mpg went up a little then the second tank went up more. I am on 3rd tank I will see what the outcome is and will update

James M. (Lake Havasu City, AZ, US)

It work's, and does what they say . My truck keep going in to regen , and now it’s running fine with out going in to regen.

Protect Your Investment with Archoil

ARCHOIL® is a leading supplier of high-performance fuel and oil treatments. Our team works tirelessly to develop premium products that deliver exceptional results.

Archoil formulations address lubrication and fuel-related challenges present in diesel vehicles, old and new. Changes in equipment design as well as the introduction of biofuel and ultra low sulfur diesel blends mandate progressive solutions to overcome new problems.

Contact us at (203) 265-5700 or online with any questions.