Best Diesel Engine Cleaner for Injectors and Fuel Systems

#1 · Best Overall

1. Archoil AR6400-D Cleaner

Best for: Injector and DPF maintenance.

Why it ranks #1: A dedicated deep-clean formula targets injector deposits and DPF deposits; its 12-ounce bottle treats 30–40 gallons and is poured into the fuel tank.

A single tank pour treats 30–40 gallons and lets you keep driving normally, making Archoil AR6400-D a practical choice for a scheduled fuel-system clean. Its rapid-action formula targets injector deposits and DPF buildup, with injector cleaning intended to restore spray patterns and support smoother running and response.

The 12-ounce bottle treats 30–40 gallons, so buyers can match a dose to a typical tank without adding a separate cleaning step: pour it in and drive normally. Archoil recommends use every 5,000 miles or as needed, giving maintenance a clear interval. The stated injector and DPF deposit-control focus suits owners addressing both fuel delivery and DPF performance, while the cleaner is also identified for turbo deposit control. It is a fuel-tank treatment, not a standalone workshop cleaning procedure.

Skip it if you want a treatment for every fill-up; Archoil AR6500 instead specifies that routine dosing pattern.

Choose this for diesel owners seeking a tank-added cleaner with stated injector, DPF, and turbo deposit targets. Its 30–40-gallon treatment and 5,000-mile guidance suit periodic maintenance, rather than a product specified for every fill-up.

Listed on Amazon as: Archoil AR6400-D Diesel Fuel System Cleaner (12 oz) Deep Clean – Injector Cleaner, Turbo & DPF Deposit Control

#2 · Injector Cleaner

2. Liqui Moly Diesel Purge

• Size: 16.9 Fl Oz (Pack of 2)

Best for: Two-bottle injection-cleaner set.

Why it ranks #2: Its product name specifically identifies an injection cleaner, making it a close match for buyers focused on cleaning diesel injectors.

The listing specifies two 500 ml bottles of Liqui Moly Diesel Purge Injection Cleaner, giving buyers a paired supply of liquid injection cleaner. It identifies the product as an injection cleaner but does not state a treatment method, vehicle compatibility, or cleaning results, so it best suits shoppers who already know this product and its application.

Each bottle is listed at 16.9 fluid ounces, and the pack contains two, a useful quantity detail for buyers planning their supply before ordering. The liquid form identifies what arrives, while the injection-cleaner name points to its stated category. However, the supplied product details do not explain whether it is poured into a tank or used another way, nor do they provide a dose or engine-system compatibility. Check those instructions from an authoritative product source before choosing a workflow.

Skip it if you need stated dosing instructions and engine compatibility in the listing; Archoil AR6400-D provides a tank dose and use interval.

Consider this set if you are seeking Liqui Moly’s named Diesel Purge injection cleaner and can establish its application instructions separately. The listing confirms liquid bottles, but does not specify a treatment method or compatible systems.

Listed on Amazon as: Liqui-Moly Diesel Purge Injection Cleaner (500 ml 16.9 oz set of 2

#3 · Deep-Clean Option

3. Lucas Diesel Deep Clean

• Weight: 249 g
• Size: 1 Count (Pack of 1)

Best for: Lucas Oil bottle option.

Why it ranks #3: The 16-ounce product is explicitly named Diesel Deep Clean, a direct fit for shoppers looking for a cleaner rather than an everyday treatment.

Lucas Oil Diesel Deep Clean is identified as a 16-ounce diesel cleaner in a single bottle, giving buyers a clearly stated product size and container. The supplied listing offers little application or performance detail, so its strongest fit is someone already seeking this named Lucas Oil product rather than shoppers comparing specified treatment rates.

The one-count bottle contains 16 ounces, and the bottle format makes the product’s supplied form clear for storage and handling. Lucas Oil identifies it as Diesel Deep Clean, but the provided item details do not state how to apply it, how much fuel it treats, or what deposits it targets. Buyers who need a defined tank dose or a particular injector or DPF claim should use those criteria to guide their choice; this listing alone does not establish them.

Skip it if you need a stated tank-treatment rate; Archoil AR6400-D specifies coverage of 30–40 gallons per bottle.

This suits a buyer specifically seeking Lucas Oil Diesel Deep Clean in a 16-ounce bottle. Choose it when the product identity and size are enough to start your comparison; the supplied details do not establish dosing or target deposits.

Listed on Amazon as: Lucas Oil 16 Oz. Diesel Deep Clean – 1 Each

#4 · Fuel-System Cleaner

4. Hot Shot's Secret Diesel Extreme

• Weight: 0.45 kg
• Size: 16 Fl Oz (Pack of 1)

Best for: Deposit and water cleanup.

Why it ranks #4: Its listed complete-system cleaning claims include deposits, water, and sludge, alongside cetane improvement and a 16-ounce bottle.

Hot Shot’s Secret Diesel Extreme targets deposits, water, and sludge across the fuel system, giving diesel owners a single treatment focused on several listed contaminants. The 16-ounce liquid also aims to improve cetane, with the product description connecting that fuel-quality benefit to smoother, more efficient combustion and easier starting.

The complete-system cleaning claim covers deposits, water, and sludge, a combination that may matter to owners looking beyond injector deposits alone. The formula contains cumene and is described as enhancing fuel quality and combustion efficiency; the listing also names easier starts, stronger acceleration, and reduced emissions as intended outcomes. With a 16-ounce bottle, it is a defined quantity for planning a treatment. The supplied details do not specify a gallons-treated rate, so dosing needs should be checked separately.

Skip it if you require a stated gallons-per-bottle rate; Archoil AR6400-D specifies treatment for 30–40 gallons.

This fits diesel owners seeking a cleaner whose stated targets include deposits, water, and sludge, plus cetane improvement. Consider the missing treatment-rate detail before relying on it for a precisely measured tank dose.

Listed on Amazon as: Hot Shot's Secret Diesel Extreme, 16 oz, Fuel System Cleaner

#5 · Large Bottle

5. Power Service Diesel Kleen 64 oz

• Weight: 4 lb

Best for: Large-volume injector cleaner.

Why it ranks #5: It cleans dirty injectors and addresses internal and external deposits; the 64-ounce bottle suits buyers wanting a larger package.

Power Service Diesel Kleen +Cetane Boost is listed for both modern HPCR and older injection systems, giving it broad stated compatibility for mixed diesel equipment. Its 64-ounce bottle targets internal and external injector deposits, while Slickdiesel Lubricator is included to protect fuel pumps and injectors from wear linked to poor-quality ULSD.

The HPCR and older-system compatibility claim makes this a useful option for owners who need one cleaner across different diesel injection setups. Its stated cleaning action removes internal and external injector deposits and helps prevent injector sticking, directly addressing fuel delivery concerns. The formula also includes Slickdiesel Lubricator for pump and injector wear protection, and the listing says it works in ULSD, biodiesel, and biodiesel blends. The 64-ounce size suits buyers seeking a larger supply, though no gallons-treated rate is provided here.

Skip it if you want a 12-ounce bottle for smaller treatment quantities; Power Service Diesel Kleen +Cetane Boost is also listed in that size.

This fits diesel owners seeking injector cleaning and lubrication across HPCR or older systems, including vehicles using biodiesel blends. The 64-ounce bottle is a substantial supply; check dosing instructions before planning treatment quantities.

Listed on Amazon as: Power Service Diesel Kleen+Cetane Boost 64 oz, Pack of 1 3064-06 Grey

#6

6. Power Service Diesel Kleen 12 oz

• Weight: 8 lb

Best for: Multi-vehicle injector upkeep.

Why it ranks #6: The listed pack contains nine 12-ounce bottles, and Diesel Kleen is described as an injector cleaner and performance improver.

Power Service Diesel Kleen +Cetane Boost comes as nine 12-ounce bottles, offering separate smaller containers for repeated use across a diesel-maintenance routine. Its stated cleaning targets internal and external injector deposits in HPCR and older systems, and Slickdiesel Lubricator is included to protect pumps and injectors from wear.

The nine 12-ounce bottles let owners keep treatment in separate containers rather than relying on one large bottle, which can help organize repeated maintenance. Power Service says the formula prevents injector sticking and removes internal and external deposits in both HPCR and older systems. It also contains Slickdiesel Lubricator for fuel-pump and injector protection, and is listed for ULSD, biodiesel, and biodiesel blends. No treatment coverage per bottle is supplied, so the quantity alone cannot establish a dose schedule.

Skip it if you prefer one larger container; Power Service Diesel Kleen +Cetane Boost is also listed in a 64-ounce bottle.

Choose this for diesel owners who prefer smaller containers for repeated injector maintenance and need stated compatibility with HPCR or older systems. The pack quantity is clear, but dosing coverage per bottle is not.

Listed on Amazon as: Power Service Diesel Kleen +Cetane Boost – 12 Ounce (Pack of 9)

#7

7. Archoil AR6500 Diesel Treatment

• Weight: 2.95 lb

Best for: All-diesel fill-up treatment.

Why it ranks #7: It includes injector cleaning and deposit control, but is positioned for treatment at every fill-up rather than as a dedicated deep cleaner.

Archoil AR6500 treats up to 400 gallons from its 40-ounce bottle, while its long neck and measuring chamber make repeated fill-up dosing more straightforward. The treatment is listed for all diesel vehicles and equipment, including modern HPCR systems, so its stated scope reaches from light-duty vehicles to heavy-duty equipment.

The long neck and measuring chamber support the stated add-at-every-fill-up routine, while coverage of up to 400 gallons gives owners a clear total treatment capacity. Archoil says the formula improves lubricity by 43%, tested to ASTM D6079, which is relevant to fuel-system components exposed to wear. Its compatibility claim includes modern HPCR systems and varied diesel equipment, from pickups and SUVs to RVs and heavy-duty vehicles. That broad stated fit makes it a routine treatment rather than only an occasional cleaner.

Skip it if you need a 12-ounce periodic injector cleaner; Archoil AR6400-D treats 30–40 gallons per bottle.

This suits diesel owners who want a measured treatment at every fill-up across vehicles or equipment, including HPCR systems. Its 40-ounce bottle and broad compatibility make it a better fit for ongoing use than occasional small-dose cleaning.

Listed on Amazon as: Archoil AR6500 Diesel Treatment (40 oz) Treats 400 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster

#8

8. Liqui Moly Super Diesel Additive

• Weight: 6.4 oz

Best for: Cetane and fuel-system upkeep.

Why it ranks #8: The description says it cleans and maintains the fuel system, but its emphasis on regular use makes it less targeted than dedicated cleaners.

Liqui Moly Super Diesel Additive combines fuel-system cleaning with a stated cetane increase, appealing to diesel owners seeking upkeep and combustion support in one additive. The product description also names corrosion prevention and increased lubrication, connecting routine use with fuel-pump and injector wear reduction.

The 300 ml additive is described as a combination of additives for cleaning and maintaining the diesel fuel system, giving it a maintenance role beyond a single named deposit target. Its stated increase in lubrication is linked to reduced fuel-pump and injector wear, while increased cetane is associated with easier starting, improved engine performance, and lower emissions. The listing recommends regular use to keep the fuel system in working order. It does not specify a gallons-treated rate, so dose planning requires further product instructions.

Skip it if you need a stated tank coverage figure; Archoil AR6500 specifies up to 400 gallons per bottle.

Choose this for regular diesel fuel-system upkeep with stated lubrication, corrosion, and cetane benefits. It suits buyers who value those named functions, but the supplied details do not provide a treatment rate for planning doses.

Listed on Amazon as: Liqui Moly Super Diesel Additive | 300 ml | Diesel additive | SKU: 2002

#9

9. Lucas Fuel Treatment

• Weight: 898 g
• Size: 32 Fluid oz

Best for: Multi-fuel system treatment.

Why it ranks #9: It cleans and lubricates diesel fuel-system components, but it is also intended for gasoline engines and is a general fuel treatment.

Lucas Oil Fuel Treatment is listed for both gasoline and diesel, making it the flexible pick for owners who maintain vehicles using either fuel. Its stated cleaning and lubrication reach injectors, the carburetor, and combustion chamber, while the quart bottle supplies a larger quantity for planned fuel-system maintenance.

The 32-ounce bottle treats more than diesel alone: the listing names gasoline and diesel, which can suit households maintaining different fuel types. Lucas Oil says the treatment cleans and lubricates injectors, carburetors, and combustion chambers, so its scope extends across several fuel-system areas. The stated effects also include neutralizing sulfur and other harmful contaminants and improving fuel flow. It is a broad fuel treatment rather than a diesel-only product, an important distinction for buyers seeking a narrowly targeted cleaner.

Skip it if you want a diesel-only product with a stated 30–40-gallon dose; Archoil AR6400-D supplies that coverage detail.

Pick this for owners wanting one fuel treatment that the listing applies to gasoline and diesel, with several fuel-system areas named. Skip it when a diesel-only cleaner or a specific treatment rate is essential.

Listed on Amazon as: Lucas Oil 10003 Fuel Treatment – 1 Quart

#10

10. Hot Shot's Secret Everyday Treatment

• Weight: 16 oz
• Size: 16 Fl Oz Squeeze

Best for: Routine diesel maintenance.

Why it ranks #10: This product is designed for everyday performance maintenance and cetane improvement, not specifically for a focused diesel engine cleaning job.

Hot Shot’s Secret Everyday Diesel Treatment is presented for regular use, making ongoing maintenance its clearest role rather than a one-off deep-clean claim. The listing says cetane can rise by up to seven points, connecting routine dosing with intended fuel-economy and performance benefits for drivers who want a continuing treatment.

The product is explicitly framed as an everyday treatment, which gives it a different maintenance cadence from cleaners described for occasional use. Its stated cetane increase of up to seven points is linked to better fuel economy and improved performance, while regular use is presented as a way to maintain engine health. The 16-ounce squeeze bottle identifies its format and quantity. The supplied details do not provide a gallons-treated rate, so owners should establish the correct dose before adopting it routinely.

Skip it if you want a cleaner with a stated 30–40-gallon dose; Archoil AR6400-D provides that treatment coverage.

Choose this for diesel owners looking for a regular-use additive and the listed cetane benefit. Its everyday positioning may suit a maintenance routine, but the supplied information does not establish a gallons-per-dose rate.

Listed on Amazon as: Hot Shot's Secret Everyday Diesel Treatment EDT, 16 oz