Archoil diesel fuel system cleaner AR6400-D 12 oz — injector, turbo & DPF deposit control for improved throttle response

Archoil AR6400-D is a concentrated 12 oz diesel fuel system cleaner formulated to remove injector, turbo, and DPF-related deposits and restore fuel-system performance when used as directed.

Designed for modern diesel engines, AR6400-D targets hard-to-remove deposits that impair spray patterns, turbo response, and particulate filter efficiency. One 12 oz bottle treats 30–40 gallons of diesel fuel and is intended for periodic use (about every 5,000 miles) or whenever performance loss, rough idling, or sluggish acceleration indicates buildup. When combined with routine maintenance and the follow-up AR6500 treatment, AR6400-D helps maintain cleaner combustion and smoother operation without disassembly.

How does AR6400-D clean injectors and improve combustion?

AR6400-D contains concentrated detergents and deposit-targeting chemistry that dissolve and disperse carbon and varnish on injector tips and in the fuel system. By restoring proper injector spray patterns, the product helps the engine burn fuel more evenly, which improves throttle response and steadies idle.

• One bottle treats 30–40 gallons to reach injector components effectively.
• Formulation breaks down carbon and varnish that restrict spray nozzles.
• Works during normal driving—no special procedures or engine disassembly needed.

Will AR6400-D help turbo response and reduce turbo deposits?

Yes. The cleaner reduces formation and accumulation of deposits that can form on turbo intake and turbine surfaces, which otherwise slow boost development. Regular use reduces sticky carbon buildup, helping the turbo spool more consistently and restoring smoother acceleration characteristics.

• Targets fuel-born residues that contribute to turbo deposits.
• Helps maintain more consistent boost and throttle response.
• Works in-line with normal fueling; no special tools required.

Can AR6400-D support DPF performance and regeneration?

AR6400-D is formulated to reduce deposit formation upstream of the diesel particulate filter (DPF), helping to limit ash and soot binding that make regenerations more frequent or less effective. While it doesn’t modify the DPF itself, cleaner combustion and lower deposit loads can support more predictable DPF behavior between scheduled maintenance events.

• Reduces upstream deposit buildup that can accelerate DPF loading.
• May help lower regeneration frequency by improving combustion efficiency.
• Compatible as part of a maintenance strategy—not a substitute for DPF service.

How do I use AR6400-D and when should I follow up with AR6500?

Pour the 12 oz bottle into a nearly full diesel tank and drive normally. Each bottle treats 30–40 gallons; repeat treatment approximately every 5,000 miles or sooner if performance symptoms return. For ongoing protection, use Archoil AR6500 Diesel Treatment at every fill-up to help maintain lubricity and consistent cetane characteristics from pump diesel.

• Pour into fuel tank; no special procedures or tools required.
• One bottle per 30–40 gallons; treat every ~5,000 miles as needed.
• Follow with AR6500 at every fill-up for maintenance benefits.

Who is this for? AR6400-D is aimed at diesel vehicle owners, fleet managers, and technicians who want a fast-acting additive to address performance-robbing fuel system deposits without removing components. It suits light- and heavy-duty turbocharged diesels, trucks, vans, and equipment where injectors, turbochargers, or DPFs are showing signs of deposit-related performance loss. Use AR6400-D as a targeted deep clean, then maintain results with AR6500 to help keep injectors, turbo, and emissions systems running more consistently between services.