Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner
Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner
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Archoil

Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner

4.8 stars out of 36 reviews
(4.8)|
36 ratings

Key item features

  • TWO-STEP FUEL SYSTEM RESET: Includes AR6400-D Diesel Fuel System Cleaner + AR6500 Diesel Treatment (40 oz) for a complete clean-and-maintain solution
  • HOW IT WORKS: Use AR6400-D first for a deep clean (12 oz treats 30-40 gallons), then use AR6500 at every fill-up for ongoing protection (40 oz treats up to 400 gallons)
  • FOR ALL DIESEL ENGINES: Suitable for all diesel vehicles and equipment, including modern HPCR systems
  • CLEANS INJECTORS & RESTORES RESPONSE: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
  • IMPROVES LUBRICITY (ASTM D6079): AR6500 is tested to improve lubricity by 43% to protect fuel system components, including wear-sensitive parts like the CP4 pump
  • BOOSTS CETANE UP TO +8: AR6500 raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability
  • SUPPORTS DPF & REDUCES REGENS: Targets deposit formation to help keep the DPF clean and reduce regeneration frequency - supporting performance and fuel economy
  • KEEPS TURBO CLEAN: Reduces deposit formation that impacts turbo response for restored boost and smoother acceleration
Current price is $59.90
Price when purchased online
  • Free shipping

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Columbus, 43215
Arrives by Thu, Apr 9
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Sold and shipped by Archoil, Inc.Pro Seller
4.7384615384615385 stars out of 5, based on 65 seller reviews(4.7)
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4.8 out of 5 stars
stars36 ratings14 reviews
How item rating is calculated
  1. 5 stars86% (31)
  2. 4 stars11% (4)
  3. 3 stars3% (1)
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Showing 1-3 of 14 reviews

Jan 30, 2026
BigBoy
Top Reviewer
Sold and shipped byArchoil, Inc.
5 out of 5 stars review

Verified Purchase

I added Archoil Diesel Fuel Treatment to my 2018 Ford 6.7 Super Duty hoping for a smoother idle. What I got felt like my truck went on a wellness retreat and came back refreshed. Cold starts are noticeably smoother, the idle is quieter, and throttle response feels cleaner and more confident. The engine just sounds happier, like it knows it's being treated right. I even saw a small bump in fuel economy, which surprised me because this truck usually drinks diesel like it's its job. No miracle horsepower claims here, just smooth, clean performance that feels how a diesel should run. Archoil is officially part of my regular maintenance now. Highly recommend if you want your diesel running smooth and proud.

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Jan 10, 2026
Kandace
Sold and shipped byArchoil, Inc.
5 out of 5 stars review

Verified Purchase

Excellent additive for your vehicle

Helpful?2PQZ6AUHCWPL858192244
Oct 22, 2025
Coop
Sold and shipped byArchoil, Inc.
5 out of 5 stars review

Verified Purchase

Sale price was good. Works to keep fuel system clean and lubricated

Incentivized Review
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