The ONLY diesel treatment to restore the entire fuel system
AR6500 is the only product to deliver a complete clean and boost package to the entire fuel system and post-combustion system (turbo, DPF) to protect your engine, improve performance and maximize fuel economy.
Boost Cetane & Increase MPG
Boost Cetane Levels
AR6500 significantly increases the cetane rating of your diesel fuel, enhancing overall engine performance.
Improve Fuel Economy
With optimized combustion efficiency, AR6500 can improve your fuel economy, reducing the frequency of refueling and saving you money.
Save on Fuel Costs
By improving fuel economy, AR6500 helps you save up to $174 per 40.6 oz bottle (based on a 10% MPG increase and average fuel prices in January 2024)
Enhance Engine Response
The cetane boost provided by AR6500 leads to quicker and smoother engine response, making your driving experience more enjoyable.
Clean injectors to restore combustion efficiency
AR6500 contains highly concentrated detergents which remove internal diesel injector deposits (IDIDs) and carbon build-up from injector tips.
AR6500 cleans injectors to:
- Improve fuel atomization
- Produce a more complete combustion
- Correct spray patterns
- Reduce carbon deposits
- Enhance fuel economy
Clean the DPF to reduce regens and avoid failure
Unlike other additives, AR6500 Diesel Treatment cleans carbon build-up from the diesel particulate filter (DPF). A clean DPF is essential for maintaining performance, reducing emissions and improving fuel efficiency.
AR6500 removes build-up and keeps the DPF free from heavy carbon deposits to:
- Reduce regeneration frequency
- Restore MPG & performance
- Avoid engine damage by preventing a clogged DPF
Improve Fuel Lubricity
AR6500 enhances the lubricity of diesel fuel, crucial for both older vehicles not designed for ultra-low sulfur diesel and newer vehicles with tighter tolerances. Lack of lubrication can lead to:
- Excessive wear
- Premature failure
- Costly repairs
The Engine Manufacturer's Association (EMA) recommends a fuel wear scar no larger than 460 microns. U.S. diesel fuel (D-975) has a 520-micron standard, needing additional lubricity. AR6500-treated fuel reduces the scar width from 614.5 to 347.5 microns—a 43% increase in lubricity, extending the life of components like the CP4 pump and preventing premature failure.
"Seeing this F-350 run as smooth as it did the day it left the dealership definitely made believers out of us."
"Archoil is the Real Deal"![]()
Diesel Power Magazine
"We are seeing great results using Archoil."
"I highly recommend Archoil products"![]()
George Swift, Mechanic, Jay Leno's Garage
"Improved fuel economy, smoother running engine and no issues with cold starts."
"We're now believers in Archoil"![]()
Diesel Tech Magazine
AR6500 FAQs
AR6500 improves lubricity in fuel, 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 for rapid cleaning of heavy carbon build-up.
AR6500 is suitable for all diesel vehicles, including newer systems such as High Pressure Common Rail.
AR6500 will remain stable indefinitely if kept away from sources of heat and sunlight.
No, AR6300 Winter Diesel Treatment is the product you need for cold weather. AR6300 contains all the benefits of AR6500 plus anti-gel protection up to -44ºF.
