Archoil Diesel Fuel System Cleaner AR6400-D 12 oz Four-Pack — Rapid Injector, Turbo & DPF Deposit Control

Archoil AR6400-D is a concentrated diesel fuel system cleaner that quickly removes injector, turbo, and DPF-forming deposits to restore performance and combustion efficiency.

This four-pack of 12 oz bottles supplies multiple treatments to address deposits that impair injector spray, turbo response, and diesel particulate filter (DPF) function. Formulated for fast action, AR6400-D is designed to be poured directly into the fuel tank and used during normal operation to dissolve and disperse buildup. Regular use helps reduce the frequency of forced DPF regenerations and can return smoother idle, crisper throttle response, and more consistent combustion.

How does AR6400-D improve injector performance?

AR6400-D targets carbon and varnish deposits that distort injector spray patterns and restrict flow. By cleaning those deposits, injectors can atomize fuel more consistently, which supports better combustion and throttle response.

• Rapid-acting formula dissolves common injector deposits.
• Restores spray pattern uniformity for smoother running.
• Each 12 oz bottle treats approximately 30–40 gallons of diesel.
• Use interval: roughly every 5,000 miles or as needed based on duty cycle.

Can this product help turbocharger and DPF issues?

Yes — AR6400-D reduces the formation of deposits that can accumulate on turbo components and in the DPF substrate. It does not repair mechanical damage, but by limiting new buildup it can support restored turbo response and fewer DPF regeneration events.

• Helps control deposits that blunt turbocharger response.
• Reduces material contributing to DPF loading and regeneration frequency.
• Compatible with routine preventive maintenance plans.
• Follow-up maintenance with Archoil AR6500 improves long-term results.

How do I use AR6400-D in my diesel vehicle?

Using AR6400-D is straightforward: pour the recommended dose into the fuel tank and drive normally to allow the cleaner to circulate through the fuel system. One 12 oz bottle treats roughly 30–40 gallons of diesel; repeat at the suggested service interval or when you notice deposit-related symptoms.

• Pour directly into fuel tank before filling or during fueling.
• Drive the vehicle normally to distribute the formula through injectors and fuel lines.
• Each bottle covers 30–40 gallons; four bottles offer multiple treatments.
• Use every ~5,000 miles or as required by operating conditions.

What should I expect after treatment?

After treatment you may notice reduced smoke, a smoother idle, and crisper acceleration as injectors and combustion return toward original performance. Improvements depend on deposit severity; severe mechanical issues will need diagnostic repair rather than a chemical cleaner alone.

• Reduced injector fouling improves combustion efficiency.
• Better turbo responsiveness when deposits were a factor.
• Lower DPF loading can mean fewer regenerations.
• Maintain results with regular follow-up treatments like AR6500.

Who is this product for? AR6400-D is aimed at diesel owners and fleet operators looking to restore fuel-system function without invasive service — especially vehicles showing injector-related roughness, sluggish turbo response, or frequent DPF activity due to deposit buildup. It’s suitable for light-duty and heavy-duty diesel engines that run on conventional pump diesel and are maintained with scheduled fuel treatments. For mechanically damaged injectors, turbos, or DPFs, combine chemical cleaning with professional inspection and repair.