• 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 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.


Customer Reviews

Based on 337 reviews

Living in CA, you need all the help you can get to get performance from your vehicle.

Michael M. (Goodyear, AZ, US)
1st time user

I have have had DPF problems and in May had it and my catalyst replaced, very expensive. When I just got home from 6 weeks out pulling trailer I got a recall notice and my be able to get my money back. So I tried the cleaner in hopes of not having that problem again. But honestly I can’t tell anything just hoping it works.

David S. (Dallas, TX, US)
Good product

I've been using products and so far so good.. Alot of these improvements are unseen and hard to tell.. regens still happening and unable to tell if they've diminished.. still evaluating

Terrance C. (Akron, IA, US)

I bought it from reading other reviews. I used it in my used 2020 Chevy 2500. I thought I was going through a lot of DEF so I decided to try it. Cut DEF consumption by over half. Engine runs smoother. Increased mileage. I got 21mpg with it a few times after running additive I have gotten 24mpg on a 700 mile trip driving 70mph. Made me a believer.

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.

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
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.