AR6500 Diesel Treatment
AR6500 Diesel Treatment
AR6500 Diesel Treatment
AR6500 Diesel Treatment
AR6500 Diesel Treatment

AR6500 Diesel Treatment

Regular price $19.95 Sale price$9.95 Save $10.00
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Save 50% on the new 10 oz AR6500 Diesel Treatment and treat 100 gallons of diesel for only $9.95!

  • Improves combustion efficiency
  • Cleans injectors, turbo and DPF (reduces regens)
  • Lubricates and protects the fuel system
  • Reduces maintenance and extends component life
  • Increases fuel economy
  • Boosts cetane up to 8 points

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

Power Boost: 2 oz (60ml) per 10 gallons of diesel. For best results use Power Boost dose in first tank of fuel.

On average, AR6500 users experience an MPG increase of up to 10%, representing a saving of up to $114 in fuel costs per 40.6 oz bottle.*

In testing, AR6500 increased MPG by 11.1% in a 2011 Ford F-350.

*Based on average U.S. fuel prices, March 2022

The common cetane rating of diesel at the pump is between 40-45 and the cetane your vehicle typically needs is between 47-50. Improving the cetane rating of fuel will increase MPG, power and response while reducing emissions.


Maximize Power, Performance and MPG

AR6500 cleans, lubricates and protects your fuel system including injectors, pumps, lines and tank in all systems including the latest high pressure common-rail systems.

AR6500 also incorporates Archoil's proven combustion modifier technology and a strong cetane boost to increase power and response at every fill-up.


• Remove carbon deposits to ensure correct injector spray pattern

• Restore lost horsepower and fuel economy

• Prevent further carbon build-up


• Remove carbon from fuel system components including the turbo, DPF and EGR

• Prevent turbo lag, restoring boost and reducing DPF regenerations

Use of AR6500 improves the poor quality of diesel at the pump, cleans and maintains fuel system components and revives engine performance. In testing, AR6500 increased MPG by 11.1%

Improve Fuel Lubricity

In independent ASTM wear scar testing, base diesel fuel produced a scar width of 614.5 microns. The same fuel treated with AR6500 produced a scar width of 347.5 microns - increasing lubricity 45%. Improving lubricity extends component life and prevents premature failure.

16.7 oz

Treats 165 Gallons

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40.6 oz

Treats 400 Gallons

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40.6 oz Two Pack

Treats 800 Gallons

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AR6500 FAQs

AR6500 cleans and maintains the fuel system and adds cetane for a boost that can be felt at every fill-up. AR6400-D is a highly concentrated one-tank fuel system cleaner to be used every 5,000 miles.

AR6500 is suitable for all diesel vehicles, including newer systems such as High Pressure Common Rail.

No. Please use Archoil AR6300 Winter Diesel Treatment for all the benefits of AR6500 plus anti-gel protection.

AR6500 will remain stable indefinitely if kept away from sources of heat and sunlight.

Customer Reviews

Based on 77 reviews
Jasen A. (Spokane, WA, US)
Awesome fuel treatment

This is exactly what I needed for my 6.0. Runs better then ever

Chad D. (Westland, MI, US)
It Works !

Improved the fuel economy in my 2005 GMC Sierra 3500 Duramax. I towed my Excursion on a flatbed from Michigan to Georgia. My first tank of fuel averaged 11.1 mpg with no Archoil, straight diesel fuel. . The second and third tanks were treated with Archoil 6500 Diesel (powerboost dose) and fuel averaged 13.8 mpg. The stuff works and it will be the only fuel treatment I will use. It pays for itself!

Chris C. (New York, NY, US)
Hoping for better results

Haven’t seen any changes yet but have high hopes. Will report back when I see a change.

Justin (Philadelphia, PA, US)

Great product idles better and almost 2mpg increase. If you have a 7.3 should definitely use these products.

Brady S. (Longview, WA, US)
Improved milage

I have only used this in my TDI so far. I always use treatments, and was using one that was highly rated. This still improved milage by 12%. Can't wait to see what it does I'm my Power stroke.