Archoil Diesel Fuel System Cleaner AR6400-D Two-Pack — 2×12 oz for Injectors, Turbo & DPF Cleaning

Archoil AR6400-D Diesel Fuel System Cleaner (Two Pack) is a concentrated, pour-in treatment that quickly removes fuel system deposits to improve injector spray, turbo response and DPF performance.

Designed for diesel engines, this two-bottle value pack supplies two 12 oz doses that each treat 30–40 gallons of fuel. The formula targets carbon and varnish buildup that reduces combustion efficiency and impairs components such as injectors, turbochargers and diesel particulate filters (DPFs). Use it as a periodic deep clean every 5,000 miles or whenever you notice rough idling, sluggish throttle response or increased regeneration cycles.

How does AR6400-D clean injectors and improve combustion?

AR6400-D contains concentrated detergents and deposit-dispersing agents engineered to dissolve carbon and varnish that clog injector tips and skew spray patterns. Restoring proper atomization improves air-fuel mixing and smoother combustion without the need for mechanical service in many cases.

• Removes deposits from injector nozzles and spray holes
• Restores uniform spray for better combustion efficiency
• Reduces rough idling and improves throttle response

Will this product help my turbocharger and acceleration?

By removing combusted-fuel residues that accumulate in the intake and on turbo-related components, AR6400-D helps recover lost turbo responsiveness. Cleaner intake passages and fewer deposits on compressor and turbine surfaces can translate to steadier boost and smoother acceleration.

• Limits deposit buildup that interferes with turbo response
• Supports consistent boost delivery and reduced lag
• Helps maintain acceleration under load

Can AR6400-D reduce DPF regeneration frequency?

The cleaner targets the fuel-side sources of excessive particulate formation by improving combustion quality and reducing soot-producing deposits. While not a substitute for a properly functioning DPF system, it can lower the rate of soot accumulation and help extend time between forced regenerations.

• Improves combustion to reduce soot production
• Helps decrease DPF loading and regeneration events
• Supports overall exhaust system cleanliness without altering emissions systems

How do I use the two-bottle pack and maintain results?

Each 12 oz bottle is poured directly into 30–40 gallons of diesel and should be driven normally to allow the formula to circulate and clean. For ongoing protection, follow up with a daily-use additive such as Archoil AR6500 at fill-ups to preserve lubricity and cetane performance.

• One bottle treats 30–40 gallons; two bottles included
• Use every 5,000 miles or as needed based on symptoms
• Follow with AR6500 at each fill-up to maintain results

Who this is for: AR6400-D (Two Pack) is aimed at diesel vehicle owners, fleet managers and contractors who want a fast, non-invasive way to remove performance-robbing fuel system deposits. It's suitable for light- and heavy-duty diesel engines equipped with modern aftertreatment systems, and for drivers who prefer to avoid immediate mechanical cleaning while improving drivability, fuel efficiency and DPF behavior through a proven chemical treatment.