Hero image 0 of Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner, 0 of 10
Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner
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
Specs
- Automotive additive typeFuel System Cleaner
- FeaturesCorrosion Protection
- Product lineDiesel Treatment
- Size40.6 oz
Current price is USD$59.90
Price when purchased online
- Free shipping
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Arrives by Tue, Jun 23
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Sold and shipped by Archoil, Inc.|Pro Seller
4.75 stars out of 5, based on 68 seller reviews(4.8)68 seller reviews
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About this item
Product details
Archoil Diesel Fuel System Kit. AR6500 Diesel Treatment + AR6400-D Diesel Fuel System Cleaner. Fully restore and maintain your diesel vehicle's fuel system with this Archoil kit. AR6400-D delivers a thorough cleaning service, removing carbon build-up from injectors and fuel system components. AR6500 should be used at every fill-up to boost diesel quality and maintain the fuel system. AR6400-D Diesel Fuel System Cleaner • Cleans injectors and injector tips • Removes turbo deposits • Reduces DPF deposits • Restores optimum power and fuel efficiency NEW: AR6500 Diesel Treatment • Increases Power and Response • Improves MPG 6-10% • Reduces DPF Regen Frequency • Dissolves Sludge and Stabilizes Fuel • Improves Lubricity and Extends Component Life • Maintains and Protects Injectors and Fuel System • Disperses Water and Protects Against Corrosion • Boosts Cetane up to 8 points
- 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
info:
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Specifications
Automotive additive type
Fuel System Cleaner
Features
Corrosion Protection
Product line
Diesel Treatment
Size
40.6 oz
Warranty
Warranty information
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Showing 1-3 of 349 reviews
Jan 30, 2026
BigBoy
Top Reviewer
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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Apr 15, 2026
Robert
5 out of 5 stars review
Verified Purchase
I liked that I could order these two items forthe same low price and get free shipping. It was simple and both items were packaged together and shipped to my door, without delay, Thanks.
Helpful?2PQZ6AUHCWPL858192244
Jan 10, 2026
Kandace
5 out of 5 stars review
Verified Purchase
Excellent additive for your vehicle
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