Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit

Diesel Fuel System Kit

$69.90 $59.90 Save $10.00
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Use AR6400-D Diesel Fuel System Cleaner and AR6500 Diesel Treatment to protect your engine, restore your diesel fuel system and boost performance. We recommend using AR6400-D every 5,000 miles and AR6500 in every tank of fuel.

AR6400-D Diesel Fuel System Cleaner

One 12 oz bottle of AR6400-D treats 40 gallons of diesel fuel.

Add directly to the fuel tank before filling up.

Use every 5,000 miles OR use once for a deep clean and then follow up with AR6500 every fill-up for continuous cleaning.

AR6500 Diesel Treatment

Standard: 1 oz (30ml) of AR6500 per 10 gallons of diesel.

Power Boost: 2 oz (60ml) per 10 gallons of diesel.

Add to the fuel tank before every fill-up. Wait until the next fill-up if using AR6400-D.

AR6400-D and AR6500 are suitable for use in all diesel vehicles, including newer systems such as High Pressure Common Rail.

Today’s diesel fuel has changed due to government regulations for Ultra-Low Sulfur Diesel (ULSD), stripping it of essential components including detergents and lubricity. Cetane levels are often too low, as many states mandate a minimum that doesn't meet most engines' needs.

Without these elements, deposits such as carbon, metal carboxylates, and zinc build up in your fuel system, turbo, and DPF. This can lead to issues like turbo lag, more frequent DPF regens, lower MPG, poor throttle response, and power loss.

Unlike other diesel additives, we don’t just treat symptoms of poor fuel quality – we eliminate the root cause. Our proprietary formula cleans your entire fuel system, including hard-to-reach components like the turbo and DPF.

AR6400-D Diesel Fuel System Cleaner targets harmful deposits like carbon, zinc, and metal carboxylates, by deep cleaning the injectors, turbo, and DPF to restore power and efficiency.

AR6500 Diesel Treatment improves fuel quality by boosting cetane, enhancing lubricity, and continuously cleaning the fuel system for peak performance, even with poor-quality diesel.

Together, these products form the Diesel Fuel System Kit, tackling both symptoms and causes of poor fuel quality. With thousands of 5-star reviews and a 100% Money Back Guarantee, Archoil is the only solution you need to protect your engine.

Before Injector Restoration After Injector Restoration

Restore & Maintain Injector Performance

  • Improve combustion
  • Correct spray patterns
  • Reduce carbon deposits
  • Enhance fuel economy

Most diesel fuel lacks the detergents and cetane needed to prevent carbon build-up, leading to poor combustion, reduced power, and potential injector failure.

AR6400-D contains a strong dose of highly concentrated detergents which quickly remove internal diesel injector deposits (IDIDs) and heavy carbon build-up from injector tips.

Before Turbo Restoration After Turbo Restoration

Remove Carbon & Reduce Turbo Lag

  • Restore boost
  • Reduce excess heat and wear
  • Prevent premature failure

Unlike other treatments, the chemistry in AR6400-D removes build-up from the turbo.

Carbon build-up in diesel turbos significantly impairs performance by restricting airflow and increasing exhaust backpressure, leading to turbo lag, reduced fuel efficiency and potential engine failure. In VGTs, carbon deposits cause the vanes to stick, resulting in inconsistent power delivery.

Before DPF Restoration After DPF Restoration

Clean the DPF & Reduce Regens

  • Restore MPG & performance
  • Protect against engine damage
  • Prevent costly DPF replacement

Over time, carbon builds up in the Diesel Particulate Filter (DPF) which results in more frequent regenerations, poor engine performance and potential failure. DPF replacement costs typically range from $2,000 up to $10,000.

AR6400-D is the only diesel fuel system cleaner specifically formulated to survive the combustion process, removing soot and heavy carbon deposits from the DPF.

Boost Cetane & Increase MPG

  • Improve combustion efficiency
  • Increase power and response
  • Extend component life

Most diesel engines require fuel with a cetane number (CN) of 48-50 to operate efficiently but fuel in the US typically has a CN of 40-45. A low CN results in poor combustion, causing soot deposits and carbon build-up in key fuel system components.

AR6500's cetane boost of up to 8 points is greater than other products on the market and enables optimized engine performance.

Improve Lubricity & Engine Life

  • Protect engine components
  • Reduce maintenance costs
  • Improve engine reliability

Lack of lubrication in diesel fuel is a major issue for both older and newer vehicles, leading to excessive wear, costly repairs and potential failure of components including injectors and pumps.

AR6500 has been independently tested to reduce wear by 43%, reducing friction and wear on the fuel system.

Keep Injectors, Turbo & DPF Clean

  • Restores injector spray patterns
  • Protects turbo performance
  • Reduces DPF regeneration frequency

AR6500 contains a maintenance dose of AR6400-D's detergent package for continuous cleaning of the entire fuel system.

As AR6500 is added to the tank at every fill-up, your engine will always have the detergents it needs to break down existing build-ups while preventing the formation of harmful new deposits.

Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit
Diesel Fuel System Kit

Diesel Fuel System Kit

$69.90 $59.90 Save $10.00
/
Kit
  • Maximize Power, Performance & MPG
  • Reduce Wear 43% - ASTM (D6079)
  • 100% Money Back Guarantee

Customer Reviews

Based on 742 reviews
95%
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3%
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J
Jose W.
Great products

The 6400 has worked great 6500 has been doing awesome in both my trucks and I'm planning to use the 9100 on my next oil change! Thanks Archoil!

k
kastle (St Louis, MO, US)

put in in every time i fill up 3-5 mpg city on a 2024 6.6 duramax

J
Johnnie L. (Oakdale, LA, US)
Great product

Archoil does what it says it does

a
andrew m.m. (Riverside, CA, US)
Good results 3 weeks in

SO far we are 1/2 way through 2 of the 3 bottles ordered on 2 different trucks and mileage is significantly improved on one and a little on the other with both units using less DEF fluid overall. Looking forward to putting another unit on it and ordering more for the other trucks as well. This was an experiment that has definitely paid off.

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