Archoil AR6400-D Diesel Fuel System Cleaner 12 oz — Deep Clean Injector, Turbo & DPF Deposit Control

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

Modern diesels suffer when carbon, lubricant additives, and soot choke injectors, turbos, and diesel particulate filters. Archoil AR6400-D is a quick-acting additive designed to be poured into a fuel tank so it blends with diesel and targets performance-robbing buildup. One 12 oz bottle treats 30–40 gallons of fuel and is intended for periodic deep cleaning every ~5,000 miles or when drivability issues emerge.

How does this product clean injectors and improve combustion?

AR6400-D works by dissolving and dispersing deposits that alter injector spray patterns. Restoring proper spray atomization helps fuel burn more completely, leading to smoother idle, crisper throttle response, and potentially better fuel economy under normal conditions.

• Removes carbon and varnish from injector tips and ports
• Restores even spray patterns for improved combustion
• One 12 oz bottle treats 30–40 gallons of diesel fuel
• Designed for periodic deep-clean use about every 5,000 miles

Will AR6400-D help turbocharged engines and reduce turbo lag?

Yes — the formula targets deposits that form on turbo intake and compressor surfaces or in the intake tract, which can blunt turbo response. By reducing buildup, turbos can spool more consistently and deliver steadier boost during acceleration.

• Helps remove intake and compressor deposits that affect turbo efficiency
• Supports faster, more predictable spool-up and acceleration feel
• Compatible with diesel engines equipped with turbos when used as directed

Can this product support DPF performance and reduce regenerations?

AR6400-D helps limit the kind of soot and coking deposits that accelerate DPF loading, supporting a cleaner filter over time. While it does not replace required DPF maintenance or hardware solutions, regular use can reduce excess buildup that forces more frequent active regenerations.

• Reduces deposit formation that can accelerate DPF clogging
• May help extend intervals between active regenerations under typical driving
• Works as part of a maintenance plan, not a DPF repair or guarantee

How do I use Archoil AR6400-D and maintain results afterward?

Using AR6400-D is straightforward: pour the entire 12 oz bottle into your diesel tank and then drive normally so the additive mixes and circulates through the fuel system. For ongoing protection, Archoil recommends following up with their AR6500 Diesel Treatment at each fill-up to address lubricity and cetane shortfalls common in pump diesel.

• Pour one 12 oz bottle into 30–40 gallons of diesel
• Drive normally to allow the treatment to circulate through injectors and systems
• Repeat deep-clean use every ~5,000 miles or as symptoms warrant
• Use Archoil AR6500 at each fill-up to sustain benefits

Who is this for? AR6400-D is aimed at diesel vehicle owners, fleet managers, and equipment operators who want a concentrated, easy-to-use cleaner to address fouled injectors, sluggish turbo response, or accelerating DPF load. It’s suitable for on-road trucks, off-road equipment, and any diesel application where periodic deep cleaning of the fuel system can restore smoother operation. This product is part of a maintenance regimen — not a warranty substitute — and should be used according to vehicle manufacturer guidance and local regulations.