AR6500 Diesel Treatment

  • Sale
  • $24.95
  • Regular price $29.95

Customer Reviews

Based on 51 reviews
Zoran Kvrgic

AR6500 Diesel Treatment

Brian Douglas

Great product.
Notice quieter engine, better mileage and more response.

Michael A Kielion
Does what it claims

Once I started using Arcoil diesel treatment my engine runs smoother better than ever before/

John McClain
It made a difference

I just did a 600 mile road trip pulling my 37 foot 5th wheel . I have made the trip 4-5 times in the past but this time I was running the 6500 arch oil blend . The truck ran very nice and my fuel mileage increased according to the edge monitor and fuel replacement at the pump

Joshua Jones
Good stuff

Archoil seems to do what it’s intended for. Will use more!

Archoil's AR6500 Diesel Treatment has been formulated to address issues associated with modern diesel fuels. AR6500 incorporates the most powerful and advanced diesel additive chemistry that is currently available. Only 100% active ingredients are used with no fillers, offering greater value per fill up.

AR6500's detergents and lubricants have been engineered to clean, lubricate and protect your fuel system including injectors, pumps, lines and tank in all systems including the latest high pressure common-rail injection fuel systems.

AR6500 also incorporates Archoil's proven combustion modifier technology and a strong cetane boost to increase power and response and reduce soot and carbon build-up in turbos, DPF and EGR components.

Features and Benefits

  • Increase 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 Against Corrosion
  • Boosts Cetane Up To 8 Points


  • A 33 oz bottle treats up to 330 gallons
  • Use AR6500 every time you add diesel fuel
  • Everyday Dose: 10 ml (1 oz) per 10 gallons
  • Power Boost: 20 ml (2 oz) per 10 gallons


Diesel Fuel System Kit

This Kit includes AR9100 Friction Modifier (16oz) and AR6400-D Diesel Fuel System Cleaner (12oz).

For the most rapid results, highest protection and best value, AR6500 should be used after application of Archoil AR6400-D Diesel Fuel System Cleaner. AR6400-D delivers a powerful and thorough cleaning service to the fuel system to quickly solve issues associated with carbon build-up and clogged injectors and should be used every 5,000 miles.

Diesel Fuel System Kit Benefits

  • AR6400-D rapidly removes internal diesel injector deposits (IDID) and carbon build-up from injector tips in all diesel applications
  • AR6400-D removes carbon build-up from the turbo. Carbon build-up negatively affects turbo performance and life
  • AR6400-D improves combustion which reduces carbon, soot and particulate exhaust emissions
  • AR6400-D is suitable for use in all diesel vehicles
  • AR6500 Diesel Treatment boosts performance, ensures fuel quality and maintains your fuel system
  • AR6500 promotes a more complete combustion which improves efficiency, power and response
  • AR6500 Boosts cetane by up to 8 points

Ultimate Diesel Kit

The Archoil Ultimate Diesel Kit includes Archoil's newly-developed AR6500 Diesel Treatment (33oz), AR9100 Friction Modifier (16oz) and AR6400-D Diesel Fuel System Cleaner (12oz).

This is the must-have kit for your diesel vehicle. AR9100 eliminates stiction and associated cold start problems while AR6500 provides regular maintenance to your fuel system at every fill-up, combating issues associated with poor quality diesel. AR6400-D provides a powerful, one-tank cleaning service to remove harmful carbon build-up from the fuel system.

Ultimate Diesel Kit Benefits

  • AR9100 eliminates hard/cold start issues caused by HEUI injector misfires in 6.0L & 7.3L Power Strokes
  • AR9100 forms a solid boundary lubricating film to improve performance and protect engines, gearboxes and hydraulic systems
  • AR6500 Diesel Treatment boosts performance, ensures fuel quality and maintains your fuel system
  • AR6500 promotes a more complete combustion which improves efficiency, power and response
  • AR6400-D rapidly removes carbon build-up from the injectors, turbo and DPF
  • AR6400-D restores performance, improves fuel economy and smooths idling