Best Fuel System Cleaner Diesel (2026)
Four diesel fuel treatments for property equipment, compared on treats volume, cetane, lubricity and deposit control, with the money-back promise and warranty terms the listings state.
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Top picks at a glance
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- 1
Best OverallArchoil AR6400-D Kit9.7/10View on Amazon - 2
Best Gallon SizeHot Shot EDT9.6/10View on Amazon - 3
Best Two PackArchoil AR65009.6/10View on Amazon - 4
Best Small BottleHot Shot Extreme9.5/10View on Amazon - 5
Archoil AR6400-D Diesel Fuel System CleanerView on Amazon - 6
Liqui-Moly Diesel Purge Injection CleanerView on Amazon - 7
Chevron Techron D Concentrate Diesel Fuel System CleanerView on Amazon - 8
Mechanic in A Bottle for Gas & Diesel Fuel Systems 24 ozView on Amazon - 9
STAR TRON Enzyme Fuel TreatmentView on Amazon
A diesel engine on a property earns its keep in mowing, hauling and winter work, and dirty injectors and fuel deposits show up as rough running and lost power. This guide compares diesel fuel treatments for that job, with the focus keyword best fuel system cleaner diesel, and it uses only what each listing states about treats volume, cetane, lubricity and deposit control. The picks below cover a kit, a jug, a pack and a small bottle, so you can match the treatment to the fuel you run through your equipment.
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Quick picks
- Best Overall Archoil AR6400-D Kit: Two-step deep clean and maintain, cetane up to 8 points Check price on Amazon
- Best Gallon Size Hot Shot EDT: 1 gallon treats 3,200 gallons, cetane up to 7 points Check price on Amazon
- Best Two Pack Archoil AR6500: Two 40 oz bottles treat 800 gallons total Check price on Amazon
- Best Small Bottle Hot Shot Extreme: 16 oz bottle treats 40 gallons Check price on Amazon
Our acreage picks
Archoil AR6400-D and AR6500 Diesel Fuel System Kit
A two-step diesel fuel system kit with a deep clean bottle and a maintenance treatment for all diesel engines.
Read the full review
The Archoil kit pairs AR6400-D, a 12 oz diesel fuel system cleaner for a deep clean of 30-40 gallons, with AR6500, a 40 oz diesel treatment for up to 400 gallons at every fill-up. The listing states the kit suits all diesel engines, including modern HPCR systems, and that AR6500 raises cetane up to 8 points with a lubricity improvement of 43% under ASTM D6079.
Deposit control is the kit's breadth: the listing states injector cleaning with restored spray patterns, DPF deposit control with reduced regeneration frequency, and turbo deposit control for restored boost. The two-step order matters in the listing, with AR6400-D used first for the deep clean and AR6500 used at every fill-up after that.
Pros
- Two-step clean and maintain in one kit
- Deep clean bottle treats 30-40 gallons
- Maintenance bottle treats up to 400 gallons
- Cetane up to 8 points with lubricity of 43%
Cons
- No warranty term is stated
- Two bottles to keep track of
- Deep clean step comes before maintenance use
- No weight is stated in the listing
Hot Shot's Secret Everyday Diesel Treatment EDT, 1 Gallon
A 1 gallon everyday diesel treatment that cleans injector deposits and protects fuel systems at every fill-up.
Read the full review
The Hot Shot EDT is a 1 gallon everyday diesel treatment that treats 3,200 gallons, with a listing use rate of 1 oz or 2 oz per 25 gallons at every fill-up. The listing states it cleans both internal and external injector deposits, enhances fuel lubricity, and boosts cetane by up to 7 points for better fuel economy.
Protection is also stated in the listing: demulsifying moisture and adding stability to fuel by preventing oxidation and degradation, with protection against rust and corrosion in fuel systems. The listing states a money-back promise with no term, so warranty scores zero for this pick under the site rules.
Pros
- 1 gallon treats 3,200 gallons
- Cleans internal and external injector deposits
- Cetane boost of up to 7 points
- Prevents rust and corrosion with moisture demulsifying
Cons
- Money-back promise with no term stated
- No DPF or turbo deposit control is stated
- No HPCR system fit is stated
- 1 gallon jug weighs 8.0 pounds to store
Archoil AR6500 Diesel Treatment, 40 oz Two Pack
A two-pack diesel treatment with cetane, lubricity and DPF and turbo deposit control for all diesel engines.
Read the full review
The Archoil AR6500 two-pack gives two 40 oz bottles, with each bottle treating up to 400 gallons and 800 gallons in total, added directly to the fuel tank at each fill-up. The listing states it suits all diesel vehicles and equipment, including modern HPCR systems, and that it raises cetane up to 8 points for faster ignition and smoother combustion.
The listing states a lubricity improvement of 43% under ASTM D6079 to help protect fuel system components, including the CP4 pump, with injector deposit cleaning for restored spray patterns. DPF deposit control with reduced regeneration frequency and turbo deposit control for restored boost are also stated in the listing.
Pros
- Two 40 oz bottles treat 800 gallons total
- Cetane up to 8 points for faster ignition
- Lubricity improvement of 43% under ASTM D6079
- DPF and turbo deposit control stated
Cons
- No warranty term is stated
- No deep clean step is included
- No weight is stated in the listing
- Two bottles to store instead of one jug
Hot Shot's Secret Diesel Extreme, 16 oz Fuel System Cleaner
A 16 oz complete fuel system cleaner that removes deposits, water and sludge while improving cetane.
Read the full review
The Hot Shot Diesel Extreme is a 16 oz fuel system cleaner that treats 40 gallons and works through the entire fuel system removing deposits, water and sludge while improving cetane for smoother, more efficient combustion. The listing states easier starts, stronger acceleration and reduced emissions as performance benefits, with a formula containing cumene.
One contradiction sits inside this listing: the bullets state a weight of 1.04 pounds, while the spec table states 0.992080179 pounds. The site rules trust the title and bullets over the spec table, so this review uses 1.04 pounds and treats the spec table figure as the conflicting one.
Pros
- Complete fuel system cleaner for deposits, water and sludge
- 16 oz bottle treats 40 gallons
- Cetane improvement stated for smoother combustion
- Small bottle at 1.04 pounds as listed in its bullets
Cons
- Money-back promise with no term stated
- No cetane points figure is stated
- No DPF or turbo deposit control is stated
- No lubricity percentage is stated
Other machines to compare
Archoil AR6400-D Diesel Fuel System CleanerCheck price on Amazon
Liqui-Moly Diesel Purge Injection CleanerCheck price on Amazon
Chevron Techron D Concentrate Diesel Fuel System CleanerCheck price on Amazon
Mechanic in A Bottle for Gas & Diesel Fuel Systems 24 ozCheck price on Amazon
STAR TRON Enzyme Fuel TreatmentCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Treats | Cetane boost | Lubricity | DPF and turbo | Warranty |
|---|---|---|---|---|---|---|
| Archoil AR6400-D Kit | 9.7/10 | 30-40 gallons plus 400 gallons | Up to 8 points | 43% | Stated | Not stated |
| Hot Shot EDT | 9.6/10 | 3,200 gallons | Up to 7 points | Stated | Not stated | Money-back promise, no term stated |
| Archoil AR6500 | 9.6/10 | 800 gallons | Up to 8 points | 43% | Stated | Not stated |
| Hot Shot Extreme | 9.5/10 | 40 gallons | Not stated | Not stated | Not stated | Money-back promise, no term stated |
Specifications are manufacturer rated as listed, collected 1 November 2026.
Acreage and terrain fit
Archoil AR6400-D Kit
Hot Shot EDT
Archoil AR6500
Hot Shot Extreme
Buying guide: the best fuel system cleaner diesel
What a diesel fuel system cleaner does
A diesel fuel system cleaner, as the listings describe it, removes deposits from injectors and the fuel system. The Hot Shot Diesel Extreme listing states removal of deposits, water and sludge, the Hot Shot EDT listing states cleaning of internal and external injector deposits, and the Archoil listings state injector deposit removal with restored spray patterns and DPF and turbo deposit control. The Hot Shot listings do not state that DPF and turbo control.
Treats volume and use rate
Treats volume separates these picks more than any other figure. The Hot Shot EDT jug treats 3,200 gallons, the Archoil AR6500 two-pack treats 800 gallons in total, the Archoil kit gives a deep clean for 30-40 gallons plus maintenance for up to 400 gallons, and the Hot Shot Diesel Extreme bottle treats 40 gallons. The EDT listing states a use rate of 1 oz or 2 oz per 25 gallons at every fill-up, the AR6500 listings state adding at each fill-up, and the kit listing states AR6400-D first, then AR6500 at every fill-up.
Cetane, lubricity and deposits
Cetane and lubricity figures come only from the listings that state them. The Archoil kit and two-pack both state cetane up to 8 points and lubricity of 43% under ASTM D6079, with protection including the CP4 pump. The Hot Shot EDT states cetane up to 7 points and enhanced lubricity with no percentage, plus rust and corrosion protection with moisture demulsifying. The Diesel Extreme states cetane improvement with no points figure and no lubricity percentage.
Warranty terms
Warranty terms are thin across these listings. The Hot Shot listings state a money-back promise with no term, so warranty scores zero for those picks under the site rules, which require a concrete term. The Archoil listings state no warranty term at all, so warranty also scores zero for those picks. Do not read a money-back promise as a term of years or months, since neither Hot Shot listing states one.
Read the manual, keep children and pets out of the yard while you work, wear eye and hearing protection and sturdy footwear, and never exceed the slope rating of your machine. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
Matching It to Your Property
- Diesel equipment that runs through many gallons: the EDT jug treats 3,200 gallons, and the AR6500 two-pack treats 800 gallons in total.
- A deep clean followed by maintenance: the kit gives AR6400-D first for 30-40 gallons, then AR6500 for up to 400 gallons at every fill-up.
- Small fuel use or a first bottle: the Diesel Extreme bottle is 16 oz and treats 40 gallons.
- Storage on the property: the EDT jug is 1 gallon and weighs 8.0 pounds, while the Extreme bottle weighs 1.04 pounds as listed in its bullets.
The Acre Score explained
The Acre Score weighs five factors: performance (cleaning scope, cetane and lubricity), build quality (pack and formula scope), value (treats volume for the pack size), safety (operator safety features stated) and warranty (term stated). A factor the listing does not state scores zero.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Archoil AR6400-D Kit | 9.7 | 32 | 21 | 21 | n/a | 0 |
| Hot Shot EDT | 9.6 | 29 | 21 | 22 | n/a | 0 |
| Archoil AR6500 | 9.6 | 30 | 21 | 20 | n/a | 0 |
| Hot Shot Extreme | 9.5 | 28 | 20 | 19 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
FAQ: mowing large lots
What is fuel system cleaner?
Fuel system cleaner, as these listings describe it, is a diesel additive that removes deposits from injectors and the fuel system. The Diesel Extreme listing describes removal of deposits, water and sludge, the EDT listing describes cleaning internal and external injector deposits, and the Archoil listings describe injector deposit removal with restored spray patterns.
How do you clean a diesel fuel system with these products?
These listings describe adding the treatment to the fuel tank. The EDT listing states adding at every fill-up, the AR6500 listings state adding at each fill-up, and the kit listing states AR6400-D first for a deep clean, then AR6500 at every fill-up. The Diesel Extreme listing describes a complete fuel system cleaner that works through the entire fuel system.
How often should you use fuel system cleaner?
The listings that state a frequency all state every fill-up. The EDT, AR6500 and kit listings all state every fill-up, with the kit stating AR6500 at every fill-up after the AR6400-D deep clean. The Diesel Extreme listing states no fill-up frequency, so its frequency is Not stated.
Does a diesel fuel system cleaner help a DPF and turbo?
The Archoil listings state DPF deposit control with reduced regeneration frequency and turbo deposit control for restored boost. The Hot Shot listings do not state DPF or turbo deposit control, so for those picks that control is Not stated.
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