7 Best Diesel Fuel Injector Cleaner Products Reviewed
Keeping a diesel engine humming smoothly isn’t just about regular oil changes; the health of the fuel injectors plays a pivotal role in performance, fuel efficiency, and emissions. Over time, carbon deposits and sludge can clog these tiny but mighty components, leading to rough idling, reduced power, and costly repairs. That’s why selecting the right diesel fuel injector cleaner matters – a high‑quality formula can dissolve stubborn buildup, restore spray patterns, and prolong engine life without harming seals or fuel system parts. In this guide we’ve tested dozens of products and distilled the results into the top seven cleaners that deliver real‑world benefits, so you can choose with confidence.
7 Top Diesel Fuel Injector Cleaners You Must Try
We’ve tested countless formulas, and these seven cleaners consistently deliver superior performance, protecting your engine while restoring optimal fuel efficiency.
7. Hot Shot’s Secret HSSEDT16ZS Diesel Fuel Additive
Hot Shot’s Secret Everyday Diesel Treatment (HSSEDT16ZS) is a 6‑in‑1 diesel fuel additive engineered to keep your diesel engine running like new. Each 16 oz bottle treats up to 400 gallons of diesel, delivering a comprehensive clean‑up and protection package every time you fill up. The formula boosts cetane by up to 7 points, improving combustion efficiency and fuel economy while reducing the need for frequent maintenance. It works as a fuel injector cleaner, scrubbing both internal and external deposits and enhancing lubricity to protect pumps, injectors, and other critical components. By demulsifying moisture and adding oxidation stability, the treatment also prevents rust and corrosion, extending the life of the entire fuel system. Application is simple—just pour 1 oz (or 2 oz for extra cetane and lubricity) per 25 gal of diesel during each fill‑up. Backed by Hot Shot’s science‑driven development process, this additive promises consistent performance and peace of mind on the road.
Pros
- Improves performance: Cetane boost and injector cleaning translate to smoother acceleration and better fuel mileage.
- All‑in‑one protection: Simultaneously cleans, lubricates, and shields the fuel system from rust, corrosion, and moisture.
- Easy to use: One‑step pour‑in at the pump; no special equipment or waiting time.
Cons
- Dosage sensitivity: Over‑dosing can lead to excess fuel additives, so precise measurement is important.
- Long‑term effects: Benefits are most noticeable with regular use; occasional applications may not yield significant improvements.
6. Archoil AR6500 Diesel Treatment
The Archoil Diesel Fuel System Kit pairs the powerful AR6500 Diesel Treatment (40 oz) with the AR6400‑D Diesel Fuel System Cleaner to give your diesel engine a comprehensive tune‑up. AR6500 works deep within the fuel line to restore injectors, turbochargers, and DPFs, while boosting cetane for smoother combustion, better performance, and improved miles‑per‑gallon. The AR6400‑D cleaner tackles carbon buildup and deposits, keeping the fuel system flowing freely. Note that AR6400‑D is not designed for HEUI injector stiction—use the AR9100 Friction Modifier for that specific issue.
Pros
- Restores critical fuel‑system components (injectors, turbo, DPF) in one step.
- Increases cetane rating, delivering noticeable power gains and better fuel economy.
- Easy two‑product kit eliminates the need to purchase separate treatments.
Cons
- Not suitable for HEUI injector stiction; requires an additional product (AR9100).
- Requires a full 40 oz container of AR6500, which may be more than needed for occasional maintenance.
5. Hot Shot’s Secret Everyday Diesel Treatment
Hot Shot’s Secret Everyday Diesel Treatment (EDT) is a 32 oz, 6‑in‑1 diesel additive engineered to keep your diesel engine running like new. Formulated for everyday use, it tackles injector deposits, protects against rust and corrosion, and boosts cetane by up to 7 points—delivering smoother acceleration, better fuel economy, and reduced wear on critical components such as the pump and injectors. The treatment also demulsifies moisture, stabilizes fuel, and enhances lubricity, helping to prevent oxidation and degradation. Simply add 1 oz (or 2 oz for extra cetane and lubricity) per 25 gal of diesel at each fill‑up; the easy‑pour formula mixes right into the tank with no extra steps. Powered by science‑backed chemistry, Hot Shot guarantees that every bottle meets strict performance standards before it leaves the plant, giving you confidence that your engine is protected and performing at its best.
Pros
- Improves performance & fuel economy – cetane boost up to +7 points, smoother power delivery.
- Comprehensive protection – cleans injector deposits, adds lubricity, and shields against rust, corrosion, and moisture.
- Convenient, everyday use – pour‑in formula works with any fill‑up; no special tools or timing required.
Cons
- Requires precise dosing (1 oz per 25 gal) to achieve optimal results; over‑dosing may lead to excess fuel dilution.
- Best results are seen with regular use; occasional applications won’t provide the full 6‑in‑1 benefits.
4. Hot Shot’s Secret Diesel Injector Flush
Hot Shot’s Secret Diesel Injector Flush is a service‑grade, concentrated cleaner built for professionals who need a fast, reliable way to eliminate internal diesel injector deposits (IDIDs) and bring injector balance rates back to factory specs. The formula combines powerful cetane improvers and lubricity additives, so the engine stays protected while the flush attacks coking deposits that cause rough idle, hard starts, reduced MPG, and excessive DPF regenerations. One treatment clears the entire fuel system in a single pass, cutting downtime and maintenance costs. It’s engineered for universal compatibility—whether you’re working on a light‑duty pickup, a heavy‑duty semi, a farm tractor, or construction equipment, and whether the fuel is ULSD, biodiesel blend, or renewable diesel, this flush works safely with common‑rail and direct‑injection systems alike.
Pros
- Professional‑grade cleaning power – dissolves stubborn IDIDs and restores proper injector contribution rates.
- Quick, single‑treatment application – flushes the whole fuel system at once, minimizing vehicle downtime.
- Universal compatibility – safe for all diesel engine sizes and fuel types, including ULSD, biodiesel blends, and renewable diesel.
Cons
- Concentrated formula – requires careful measurement; over‑dilution can reduce effectiveness.
- Best suited for service environments – may be more expensive than consumer‑grade cleaners for occasional DIY use.
3. Hot Shot’s Secret Diesel Extreme 1 Gallon Fuel System Cleaner
Hot Shot’s Secret Diesel Extreme is a 1‑gallon, concentrated fuel system cleaner that tackles the toughest diesel‑engine grime while boosting performance. Formulated to clean the entire fuel system—valves, pumps, rings, pistons, and upper cylinders—it also targets internal and external injector deposits, preventing varnish buildup that can cause rough idling and loss of power. The additive raises cetane by up to 7 points, delivering a more efficient burn, better fuel economy, and smoother DPF regeneration. A non‑alcohol water dispersant fortified with military‑grade rust and corrosion inhibitors stabilizes moisture, protecting metal surfaces from corrosion. Application is straightforward: just pour 8 oz per 20 gal of diesel at the pump or every 6,000 mi. Engineered with a science‑first approach, Hot Shot guarantees each batch meets rigorous performance standards before it leaves the factory.
Pros
- Improves MPG & power – higher cetane and cleaner injectors translate to noticeable fuel‑economy gains.
- Comprehensive protection – rust inhibitors and water dispersant safeguard the fuel system from corrosion and moisture.
- Easy dosing – simple pour‑in method fits any fill‑up routine.
Cons
- Requires regular dosing (every 6,000 mi) to maintain benefits, adding a small recurring step.
- May cause temporary exhaust smoke as loosened deposits burn off after the first few uses.
2. Hot Shot’s Secret Diesel Extreme 16oz Cleaner
Hot Shot’s Secret Diesel Extreme is a 16 oz, concentrated fuel‑system cleaner that tackles the toughest grime inside diesel engines. Formulated to clean, lubricate, and protect every critical component—from valves and pumps to pistons and upper cylinders—it attacks internal and external injector deposits, stubborn varnish, and rust‑inducing moisture. By boosting cetane by up to 7 points, the additive promotes a more efficient combustion cycle, which translates into better fuel economy, smoother DPF regeneration, and a noticeable lift in power. The non‑alcohol, military‑grade rust and corrosion inhibitors act as a water dispersant, stabilizing moisture and preventing rust buildup. Application is a breeze: just add 8 oz to every 20 gal of fuel at the pump or every 6,000 mi, and let the chemistry do the work. Engineered by a science‑driven team, Hot Shot guarantees that nothing leaves the facility without meeting its exacting performance standards.
Pros
- Comprehensive cleaning of both internal and external injector deposits keeps the engine running smoothly.
- Cetane boost (up to +7) improves combustion efficiency, leading to better MPG and reduced DPF regeneration frequency.
- Rust and moisture control with military‑grade inhibitors prolongs engine life and prevents corrosion.
Cons
- Requires precise dosing (8 oz per 20 gal); over‑ or under‑dosing may diminish effectiveness.
- May be less effective on severely neglected engines that need a professional power‑cleaning service.
1. Archoil AR6400-D Diesel Fuel System Cleaner
Archoil AR6400‑D Diesel Fuel System Cleaner is a high‑performance, all‑in‑one formula that attacks the toughest deposits in modern diesel engines. A single 12 oz bottle treats up to 40 gallons of diesel, making it easy to schedule a full system cleanse every 5,000 miles. The additive works fast to clean injectors, turbochargers, blocked DPFs, and dirty EGR valves, restoring lost horsepower, smoothing idle, and improving fuel economy. It’s compatible with every diesel platform, and Power Stroke owners can pair it with Archoil AR9100 Friction Modifier for a complete solution to injector stiction and overall fuel‑system health.
Pros
- Comprehensive cleaning – tackles injectors, turbo, DPF, and EGR in one step.
- Performance boost – restores power, smooths idle, and can shave a few percent off fuel consumption.
- Cost‑effective coverage – one 12 oz bottle lasts for 40 gal, so routine treatment is inexpensive.
Cons
- Requires regular dosing (every 5,000 mi) to maintain optimal results, which adds a maintenance step.
- May not fully clear severely clogged DPFs; extreme cases could still need professional cleaning.
Buying Guide
Choosing the right diesel fuel injector cleaner is crucial for maintaining engine performance, fuel efficiency, and emissions compliance. Look for products that combine proven chemistry, ease of use, and compatibility with modern diesel engines.
- Formulation quality – Choose cleaners with detergents, dispersants, and anti‑corrosion agents that safely dissolve deposits.
- Engine compatibility – Ensure the product is approved for your diesel system, whether common‑rail, pump‑injector, or turbocharged.
- Application method – Prefer formulas that can be added to the fuel tank for easy, no‑stop treatment.
- Value and concentration – Compare cost per treatment and active ingredient strength for the best return.
- Reviews and warranty – Look for strong user feedback and a manufacturer guarantee for peace of mind.
By weighing these factors, you can select a diesel injector cleaner that delivers consistent engine health and maximizes fuel economy. A well‑chosen product will keep your diesel running smoothly for miles to come.
Frequently Asked Questions
What is the best diesel fuel injector cleaner for modern engines?
For most modern diesel engines, Power Service Diesel Kleen and STP Diesel Injector Cleaner are consistently top‑rated. Both contain a blend of polyether amine (PEA) detergents and surfactants that dissolve deposits, restore spray patterns, and improve combustion efficiency. Choose the product that matches your vehicle’s specifications (e.g., low‑sulfur vs. high‑sulfur fuel) and follow the manufacturer’s dosage instructions.
How often should I add a diesel injector cleaner?
- Routine maintenance: Add a cleaner every 3,000–5,000 mi (or every 3–6 months) as part of regular fuel system upkeep.
- When symptoms appear: If you notice rough idle, reduced power, or increased fuel consumption, use a cleaner immediately and then re‑evaluate after 1,000 mi.
- Severe deposits: For engines with heavy carbon buildup, a “deep‑clean” treatment (often a higher concentration or a two‑step product) can be applied every 10,000 mi.
Can I use a gasoline injector cleaner in a diesel engine?
No. Gasoline injector cleaners are formulated for spark‑ignited engines and typically contain solvents that can damage diesel fuel pumps, high‑pressure injectors, and the common‑rail system. Always select a cleaner specifically labeled for diesel to avoid corrosion, seal damage, or warranty issues. If you’re unsure, consult your vehicle’s service manual or a qualified technician.
Conclusion
Keeping your diesel engine running smoothly hinges on clean injectors, and regular use of a quality cleaner can make a noticeable difference in performance, fuel efficiency, and emissions. The best products share common traits: strong detergent action, compatibility with modern fuel systems, and proven results from both laboratory testing and real‑world use. When choosing a cleaner, consider factors such as concentration, application method, and any manufacturer recommendations to avoid warranty issues. Incorporating a scheduled cleaning regimen into routine maintenance helps prevent costly deposits, extends injector life, and ensures your vehicle delivers the power and economy you expect.