If your diesel engine feels sluggish, runs rough, or requires frequent regenerations, deposits in the fuel system may be the culprit. A quality diesel system cleaner can restore injector spray patterns, improve combustion, and keep the DPF functioning longer.
This guide reviews five diesel system cleaner options from Archoil and Rislone, highlighting their unique benefits to help you find the best match for your vehicle.
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Archoil AR6400-D – Deep Clean in One Bottle
Brand: Archoil
Excellent for a single-application deep clean to restore injector and DPF health.
The Archoil AR6400-D is a concentrated, rapid-acting diesel fuel system cleaner designed to tackle performance-robbing deposits head-on. You simply pour one 12 oz bottle into your fuel tank for every 30–40 gallons of diesel and drive normally—no special steps required. It works quickly on injectors, removing deposits to restore proper spray patterns, which leads to smoother running and improved throttle response.
Beyond injectors, this cleaner also reduces deposit buildup in the turbo and DPF, helping your diesel particulate filter operate more efficiently and cut down on regeneration frequency. With a recommended use every 5,000 miles, the Archoil AR6400-D offers a straightforward, effective way to deep-clean your fuel system and restore lost performance without complicated procedures.
- Rapid-acting deep clean
- Restores DPF performance
- Easy pour-and-drive use
- Not a maintenance additive
- Single use per bottle
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- EASY TO USE: Pour into the fuel tank and drive normally; one 12 oz bottle treats 30-40 gallons of diesel. Use every 5,000 miles or as needed
- RAPID-ACTING DEEP CLEAN: Concentrated diesel fuel system cleaner designed to work quickly on performance-robbing deposits to restore the fuel system
- CLEANS INJECTORS FAST: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
- RESTORES DPF PERFORMANCE: Reduces deposit buildup to support a cleaner DPF and reduce regeneration frequency
- TURBO DEPOSIT CONTROL: Reduces deposit buildup that affects turbo response, supporting smoother acceleration and restored boost
- MAINTAIN RESULTS WITH AR6500: Follow up with Archoil AR6500 Diesel Treatment at every fill-up to keep the fuel system clean and address insufficient lubricity and cetane levels in diesel from the pump
Archoil Kit – Clean & Maintain Your Diesel
Brand: Archoil
Ideal if you want a one-two punch for deep cleaning plus ongoing maintenance.
The Archoil Diesel Fuel System Kit pairs the AR6400-D deep cleaner with the AR6500 Diesel Treatment for a complete two-step fuel system reset. Start by using the AR6400-D (12 oz treats 30–40 gallons) for a deep clean, then switch to the AR6500 at every fill-up for ongoing protection—the 40 oz bottle treats up to 400 gallons. This approach ensures deposits are thoroughly removed then kept from returning.
Suitable for all diesel engines including modern high-pressure common rail systems, this kit removes injector deposits and restores spray patterns for smoother running and more efficient combustion. The combination gives you both an immediate performance lift and long-term reliability, making it an ideal choice if you want to systematically care for your diesel engine over time.
- Clean-and-maintain solution
- Works on all diesel engines
- Restores injector response
- Two-step process needed
- Larger upfront cost
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- TWO-STEP FUEL SYSTEM RESET: Includes AR6400-D Diesel Fuel System Cleaner + AR6500 Diesel Treatment (40 oz) for a complete clean-and-maintain solution
- HOW IT WORKS: Use AR6400-D first for a deep clean (12 oz treats 30-40 gallons), then use AR6500 at every fill-up for ongoing protection (40 oz treats up to 400 gallons)
- FOR ALL DIESEL ENGINES: Suitable for all diesel vehicles and equipment, including modern HPCR systems
- CLEANS INJECTORS & RESTORES RESPONSE: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
- IMPROVES LUBRICITY (ASTM D6079): AR6500 is tested to improve lubricity by 43% to protect fuel system components, including wear-sensitive parts like the CP4 pump
- BOOSTS CETANE UP TO +8: AR6500 raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability
- SUPPORTS DPF & REDUCES REGENS: Targets deposit formation to help keep the DPF clean and reduce regeneration frequency – supporting performance and fuel economy
- KEEPS TURBO CLEAN: Reduces deposit formation that impacts turbo response for restored boost and smoother acceleration
Archoil AR6400-D Two Pack – Stock Up and Save
Brand: Archoil
Perfect for keeping a spare or treating two vehicles with the same effective cleaner.
The Archoil AR6400-D Two Pack gives you two 12 oz bottles of the same rapid-acting deep cleaner, perfect for treating your vehicle twice or for multiple diesel engines. Each bottle treats 30–40 gallons of diesel, so you can clean your fuel system every 5,000 miles as recommended without needing to reorder immediately. The formula works quickly on injectors, removing deposits and restoring spray patterns for smoother operation and improved response.
Beyond injectors, this cleaner also reduces deposit buildup in the turbo and DPF, supporting a cleaner DPF and reducing regeneration frequency. With the two-pack, you have the convenience of a spare bottle on hand when you need it, making it easy to stay on top of your diesel’s fuel system health without extra trips to the store.
- Convenient two-pack value
- Each bottle treats 30–40 gallons
- Rapid deposit removal
- No maintenance additive included
- Requires separate products
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- EASY ONE-BOTTLE USE (2-Pack Value): Includes two 12 oz bottles. Pour into the fuel tank and drive normally. Each bottle treats 30-40 gallons of diesel. Use every 5,000 miles or as needed
- RAPID-ACTING DEEP CLEAN: Concentrated diesel fuel system cleaner designed to work quickly on performance-robbing deposits to restore the fuel system
- CLEANS INJECTORS FAST: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
- RESTORES DPF PERFORMANCE: Reduces deposit buildup to support a cleaner DPF and reduce regeneration frequency
- TURBO DEPOSIT CONTROL: Reduces deposit buildup that affects turbo response, supporting smoother acceleration and restored boost
- MAINTAIN RESULTS WITH AR6500: Follow up with Archoil AR6500 Diesel Treatment at every fill-up to keep the fuel system clean and address insufficient lubricity and cetane levels in diesel from the pump
Rislone 4784 – Stop DEF Crystallization
Brand: Rislone
Best for low-speed drivers needing to prevent DEF crystal buildup in the SCR system.
The Rislone 4784 DEF Crystal Clean is specifically formulated to combat DEF crystallization in diesel engines that often run at slow speeds, low loads, or make frequent stops. These driving conditions are prone to causing white crystal buildup in the SCR system, but regular use every 5,000 miles helps keep the system clean and prevents those issues from returning. It works with all AdBlue, AUS 32, BlueHDi, and BlueTEC systems.
Importantly, this cleaner will not void your manufacturer’s new vehicle warranty and is designed for use on vehicles with DOC catalytic converters, DPF particulate filters, and SCR selective catalytic reduction systems. If your driving routine includes lots of stop-and-go or short trips, the Rislone 4784 offers a targeted solution to maintain DEF system integrity and avoid costly repairs related to crystallization.
- Prevents white crystallization
- Safe for AdBlue systems
- Works on low-speed drives
- Not a fuel system cleaner
- Only tackles DEF issues
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- Excellent for diesel vehicles driven regularly at slow speeds, low loads, short durations or make frequent stops as these are more prone to having the problem of crystallization deposit build up in the SCR system.
- Regular use every 5,000 miles not only keeps the system clean, but works to prevent the white crystallization issues from returning.
- Will not void manufacturer’s new vehicle warranty. Specifically designed and safe to use on vehicles which have DOC catalytic converters, DPF particulate filters, SCR selective catalytic reduction devices, ASC ammonia slip catalyst or DEF / AdBlue systems.
- Works with all AdBlue, Aria 32 (Automotive Nitrogen Oxide Liquid Reducing Agent), AUS 32 (Aqueous Urea Solution), BlueHDi, BlueTEC, Cummins, DEF UREA, Duramax, EcoDiesel, PowerStroke, TDI Clean Diesel, and many more.
- DEF Crystal Clean is specifically designed to only be installed in the Diesel Exhaust Fluid / AdBlue tank which usually has a blue cap. Do not add to the diesel fuel tank.
Archoil AR6400-D Four Pack – Bulk Savings
Brand: Archoil
Great for stocking up; gives you four deep-cleans for one engine or treatments for multiple vehicles.
The Archoil AR6400-D Four Pack provides four 12 oz bottles of the same rapid-acting diesel fuel system cleaner, giving you a bulk supply for multiple treatments or for several vehicles. Each bottle treats 30–40 gallons of diesel, and using one every 5,000 miles keeps your engine clean without frequent reordering. The concentrated formula removes injector deposits quickly, restoring spray patterns for smoother running and improved combustion.
It also reduces deposit buildup in the turbo and DPF, supporting a cleaner DPF and reducing regeneration frequency. With the four-pack, you have a generous supply on hand, making it convenient to perform regular deep cleans on your diesel engine. This is an excellent option if you want to stock up and ensure you never run out of this effective cleaner.
- Four bottles for multiple uses
- Same effective deep-clean formula
- Easy pour-and-drive each time
- Only deep-cleaning function
- No ongoing protection
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- EASY ONE-BOTTLE USE (2-Pack Value): Includes two 12 oz bottles. Pour into the fuel tank and drive normally. Each bottle treats 30-40 gallons of diesel. Use every 5,000 miles or as needed
- RAPID-ACTING DEEP CLEAN: Concentrated diesel fuel system cleaner designed to work quickly on performance-robbing deposits to restore the fuel system
- CLEANS INJECTORS FAST: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
- RESTORES DPF PERFORMANCE: Reduces deposit buildup to support a cleaner DPF and reduce regeneration frequency
- TURBO DEPOSIT CONTROL: Reduces deposit buildup that affects turbo response, supporting smoother acceleration and restored boost
- MAINTAIN RESULTS WITH AR6500: Follow up with Archoil AR6500 Diesel Treatment at every fill-up to keep the fuel system clean and address insufficient lubricity and cetane levels in diesel from the pump
Buyer’s Guide: What to Consider
Consider your usual driving patterns, current engine issues, and whether you need a one-time deep clean or ongoing protection when choosing a diesel system cleaner.
- Type of Cleaner: A dedicated cleaner targets deposits in injectors, turbos, and DPFs for a thorough restoration.
- Usage Frequency: For severe buildup, choose a concentrated cleaner; for maintenance, opt for a regular-use product.
- Engine Compatibility: Ensure the cleaner is safe for modern HPCR, DOC, DPF, and SCR systems like AdBlue and BlueTEC.
- Pack Size: Single-bottle or multi-pack options let you stock up or treat multiple vehicles conveniently.
- Added Benefits: Products that also boost lubricity or control DEF crystallization provide added value.
Conclusion
Choosing the right diesel system cleaner can restore performance, protect sensitive emissions components, and extend engine life. The Archoil AR6400-D standalone or in multi-packs offers a proven deep clean for injectors and DPFs, while the complete kit gives you a maintenance routine.
For drivers concerned with DEF crystallization, the Rislone 4784 is a targeted solution. Evaluate your specific needs—whether a one-time clean or ongoing care—and pick the formula that fits your driving habits.