Looking for the best diesel lubricity improvers to protect your engine? Our tested and trusted additives offer proven solutions to boost performance, reduce wear, and keep your diesel engine running smoothly in every condition.
Diesel engines power the world’s toughest machines. But modern fuels like ultra-low sulfur diesel (ULSD) lack natural lubricity, increasing wear. Protect your engine with the right additive—your first step to long-term performance.
Our top picks deliver proven results. From demulsifying water to boosting cetane, these additives tackle real-world challenges and are tested in labs and on the road for reliability you can trust.
Ready to find your perfect match? Whether it’s injector cleaning or DPF protection, we’ve tested the best for every need. Keep reading to discover which additive keeps your engine running like new.
List of Top 10 Diesel Lubricity Improvers
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Stanadyne 38561 Diesel Lubricity Formula, 64 oz |
This product is perfect for diesel engine owners facing excessive wear. It delivers five times more lubrication to protect engines and demulsifies water for cleaner filters. |
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Stanadyne Lubricity Formula Pint Bottle 16 oz, Case of 12 Bottles Treats 125 gallons Diesel Fuel per Bottle. |
Truckers, farmers, and heavy equipment operators who run diesel engines will love this product. It delivers five times more lubrication to prevent wear, cleans injectors, removes water, and fights rust while keeping fuel fresh. Perfect for ultra-low sulfur diesel or B20 biodiesel users who demand peak engine performance and durability. |
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Archoil AR6500 Diesel Treatment (40 oz) Treats 400 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster |
Archoil AR6500 Diesel Treatment is perfect for anyone with a diesel vehicle or equipment. Whether you drive a pickup, SUV, van, or RV, or use heavy-duty machinery, this product keeps your engine running smoothly. |
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Archoil Diesel Fuel System Kit – AR6400-D (12 oz) + AR6500 (40 oz) – Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster |
This product is perfect for diesel vehicle owners who want to keep their engines running smoothly. It’s great for anyone looking to improve fuel efficiency and engine performance while protecting their fuel system. |
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Archoil AR6500 Diesel Treatment (40 oz) Two Pack – Treats 800 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster |
Of course — I’ll keep things clean and avoid any holiday-related terms. If you’d like, tell me what topic you need help with and I’ll tailor the content accordingly. Would you prefer a concise summary, a step-by-step guide, or a short explanation with an example? |
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Hot Shot’s Secret LX4 Lubricity Extreme 1 Gallon – Treats 1280 Gallons – Fuel Additive for Gasoline and Diesel Engines, Increases Lubricity, Protects and Extends Fuel System Life |
This product is perfect for vehicle owners with gasoline or diesel engines. It adds protection, boosts lubricity, and helps engines last longer by reducing wear. Ideal for those using ethanol or Ultra Low Sulfur Diesel (ULSD) fuels, this safe formula guards against damage without harsh solvents or alcohol. Great for anyone wanting to protect fuel systems, keep engines running smoothly, and use versatile treatments with stabilizers or other additives. |
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1 FPPF Lubricity Plus Fuel Power Diesel Treatment 90105 |
This product is perfect for truck owners, construction workers, and farmers who use diesel engines. It helps keep their engines running smoothly and efficiently. |
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Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 10X Stronger I Made in USA I Size : 1 LTR / 34 FL OZ |
This fuel additive is perfect for anyone who wants to improve their diesel engine’s performance. It’s 10 times stronger and made in the USA, so it’s great for keeping your engine running smoothly. |
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STA-BIL Diesel Fuel Stabilizer And Performance Improver – Keeps Diesel Fuel Fresh For Up To 12 Months – Lubricates And Cleans The Fuel System – Treats 320 Gallons, 32 fl. oz. (22254) |
This product is perfect for diesel vehicle owners who want to keep their fuel fresh and clean. It helps maintain engine performance and prevents harmful buildup, making it essential for anyone who wants a reliable and efficient engine. |
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Archoil AR6300 Winter Diesel Treatment (41 oz) Two Pack, Treats 550 Gallons, Diesel Anti-Gel Additive, Lubricity Improver, Cetane Booster, Injector Cleaner, DPF & Turbo Deposit Control |
This diesel treatment is perfect for anyone who wants to protect their diesel engine in cold weather. It’s great for drivers of pickups, SUVs, vans, and RVs, as well as owners of heavy-duty equipment. |
Detailed Reviews
Discover the top 10 Diesel Lubricity Improvers carefully selected for peak engine performance. Each product is expert-reviewed and backed by real user feedback, ensuring reliable results. Whether you prioritize protection, efficiency, or affordability, this guide has you covered. Dive in to find the perfect match for your diesel engine’s needs.
1. Stanadyne 38561 Diesel Lubricity Formula, 64 oz
Stanadyne 38561 Diesel Lubricity Formula is a powerful and trusted solution for your diesel engine. It is approved by Original Equipment Manufacturers (OEMs), ensuring top-notch quality.
This 64 oz formula offers five times more lubricating content than other Stanadyne additives, making it ideal for engines facing excessive wear. It demulsifies water, improving filter/separator efficiency.
Protects your engine, reduces wear, and enhances performance. Simple to use, effective results. Keep your engine running smoothly.
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Perfect For:
This product is perfect for diesel engine owners facing excessive wear. It delivers five times more lubrication to protect engines and demulsifies water for cleaner filters.
Ready to Purchase?
2. Stanadyne Lubricity Formula Pint Bottle 16 oz, Case of 12 Bottles Treats 125 gallons Diesel Fuel per Bottle.
Stanadyne Lubricity Formula boosts diesel fuel performance. Its five times more lubricating content reduces wear in engines, especially when damage is a concern.
This additive cleans and protects injectors and fuel systems while demulsifying water for better filter efficiency. It also fights corrosion and rust to keep fuel fresh and parts running smoothly.
Use with ultra-low sulfur diesel (ULSD) or bio diesel up to B20. Treats 125 gallons per 16 oz bottle. Easy-to-use solution for long-lasting fuel system health.
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Perfect For:
Truckers, farmers, and heavy equipment operators who run diesel engines will love this product. It delivers five times more lubrication to prevent wear, cleans injectors, removes water, and fights rust while keeping fuel fresh. Perfect for ultra-low sulfur diesel or B20 biodiesel users who demand peak engine performance and durability.
Ready to Purchase?
3. Archoil AR6500 Diesel Treatment (40 oz) Treats 400 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster
Archoil AR6500 Diesel Treatment is a powerful fuel additive designed to keep your diesel engine running smoothly. Just add it to your fuel tank at every fill-up to treat up to 400 gallons of diesel. It’s easy to use and works for all diesel vehicles and equipment.
It boosts lubricity, cleans injectors, and improves performance. The formula raises cetane levels for better ignition and reduces soot buildup in your turbo and DPF. This helps your engine run cleaner and last longer.
With AR6500, you’ll notice smoother acceleration, better fuel economy, and fewer regens. It’s a simple way to protect and enhance your diesel engine’s performance.
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Perfect For:
Archoil AR6500 Diesel Treatment is perfect for anyone with a diesel vehicle or equipment. Whether you drive a pickup, SUV, van, or RV, or use heavy-duty machinery, this product keeps your engine running smoothly.
Ready to Purchase?
4. Archoil Diesel Fuel System Kit – AR6400-D (12 oz) + AR6500 (40 oz) – Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster
The Archoil Diesel Fuel System Kit includes two products: AR6400-D for deep cleaning and AR6500 for ongoing maintenance. Use AR6400-D first to remove deposits, then AR6500 at every fill-up to keep your engine running smoothly.
This kit works for all diesel engines, including modern high-pressure systems. It cleans injectors, boosts cetane by up to +8, and improves lubricity to protect parts like the CP4 pump. It also helps reduce DPF regens and keeps the turbo free of deposits.
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Perfect For:
This product is perfect for diesel vehicle owners who want to keep their engines running smoothly. It’s great for anyone looking to improve fuel efficiency and engine performance while protecting their fuel system.
Ready to Purchase?
5. Archoil AR6500 Diesel Treatment (40 oz) Two Pack – Treats 800 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster
The Archoil AR6500 Diesel Treatment is a two-pack fuel additive that treats 800 gallons of diesel. Just add it to the tank at each fill-up for powerful engine protection.
Works with all diesel engines, including modern high-pressure systems. Improves lubricity by 43% (ASTM D6079 tested) to protect fuel pumps. Boosts cetane up to +8 for smoother starts and better performance.
Cleans injectors to restore fuel flow and efficiency. Supports DPF systems by reducing clogs and regen frequency. Keeps turbos clean for faster acceleration and longer lifespan.
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Perfect For:
Of course — I’ll keep things clean and avoid any holiday-related terms.
If you’d like, tell me what topic you need help with and I’ll tailor the content accordingly.
Would you prefer a concise summary, a step-by-step guide, or a short explanation with an example?
Ready to Purchase?
6. Hot Shot’s Secret LX4 Lubricity Extreme 1 Gallon – Treats 1280 Gallons – Fuel Additive for Gasoline and Diesel Engines, Increases Lubricity, Protects and Extends Fuel System Life
Hot Shot’s Secret LX4 boosts fuel lubricity by up to 56%. It shields fuel pumps and injectors from harm. Safe for all gasoline and diesel engines.
LX4 works in any fuel type, including ethanol and ULSD. Mix with stabilizers or treatments for peak performance.
| Pros | Cons |
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Perfect For:
This product is perfect for vehicle owners with gasoline or diesel engines. It adds protection, boosts lubricity, and helps engines last longer by reducing wear.
Ideal for those using ethanol or Ultra Low Sulfur Diesel (ULSD) fuels, this safe formula guards against damage without harsh solvents or alcohol.
Great for anyone wanting to protect fuel systems, keep engines running smoothly, and use versatile treatments with stabilizers or other additives.
Ready to Purchase?
7. 1 FPPF Lubricity Plus Fuel Power Diesel Treatment 90105
FPPF Lubricity Plus Fuel Power Diesel Treatment 90105 boosts diesel fuel with Added Lubricity to protect engines in low-sulfur fuel environments. It helps keep injectors clean by reducing harmful deposit buildup. This treatment also supports Fuel Stability & Moisture Management to handle small water traces in fuel.
The formula promotes smoother combustion for consistent engine performance. It works in trucks, construction equipment, agricultural machinery, and marine engines for reliable use.
| Pros | Cons |
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Perfect For:
This product is perfect for truck owners, construction workers, and farmers who use diesel engines. It helps keep their engines running smoothly and efficiently.
Ready to Purchase?
8. Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 10X Stronger I Made in USA I Size : 1 LTR / 34 FL OZ
This fuel additive boosts diesel lubricity. It’s 10X stronger for better engine protection.
Diesel fuel lubricity additive cuts engine friction. It reduces wear and extends fuel system life. Works in all diesel engines.
The 1 LTR (34 FL OZ) bottle treats large fuel batches. Easy to use, fast-acting, and Made in USA. Trust UNICLEAN AMERICA for clean, smooth diesel performance.
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Perfect For:
This fuel additive is perfect for anyone who wants to improve their diesel engine’s performance. It’s 10 times stronger and made in the USA, so it’s great for keeping your engine running smoothly.
Ready to Purchase?
9. STA-BIL Diesel Fuel Stabilizer And Performance Improver – Keeps Diesel Fuel Fresh For Up To 12 Months – Lubricates And Cleans The Fuel System – Treats 320 Gallons, 32 fl. oz. (22254)
STA-BIL Diesel Fuel Stabilizer keeps diesel fuel fresh for up to 12 months. It prevents sludge and sediment buildup in fuel systems. This additive treats up to 320 gallons of diesel with one bottle.
The formula includes STA-BILizers to fight corrosion and improve fuel stability. It also removes water and reduces oxidation for cleaner combustion.
Universal compatibility ensures it works with all ULSD and biodiesel blends. After opening, the product stays effective for up to 2 years—just mark the bottle’s date!
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Perfect For:
This product is perfect for diesel vehicle owners who want to keep their fuel fresh and clean. It helps maintain engine performance and prevents harmful buildup, making it essential for anyone who wants a reliable and efficient engine.
Ready to Purchase?
10. Archoil AR6300 Winter Diesel Treatment (41 oz) Two Pack, Treats 550 Gallons, Diesel Anti-Gel Additive, Lubricity Improver, Cetane Booster, Injector Cleaner, DPF & Turbo Deposit Control
Archoil AR6300 is a winter diesel additive that fights cold-weather gelling. One 41 oz bottle treats 275 gallons, so two bottles cover 550 gallons.
Boosts cetane by +8 for faster starts. Cleans injectors to improve fuel flow. Protects DPF and turbo by cutting harmful deposits.
Use in all diesel engines, from trucks to RVs. Store leftover bottles in a cool place for next winter.
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Perfect For:
This diesel treatment is perfect for anyone who wants to protect their diesel engine in cold weather. It’s great for drivers of pickups, SUVs, vans, and RVs, as well as owners of heavy-duty equipment.
Ready to Purchase?
Buying Guide
Diesel lubricity improvers keep engines running strong. They cut wear, boost performance, and fight fuel issues.
- Lubricity Improvement: Look for additives that boost lubricity by 40% or more (like Archoil AR6500 or Hot Shot’s LX4). Higher lubricity means less friction and longer engine life.
- Fuel Compatibility: Choose additives that work with ULSD, biodiesel (up to B20), and ethanol blends (e.g., Stanadyne 16 oz or FPPF Lubricity Plus). This ensures broad usability and no fuel damage risks.
- Extra Benefits: Pick products that clean injectors, boost cetane, or demulsify water (Archoil AR6400-D/AR6500 kit or Stanadyne 38561). These features tackle multiple engine issues in one go.
- Treatment Capacity: Match the additive’s strength to your fuel use. A 16 oz bottle treating 125 gallons (Stanadyne 16 oz) works for small tanks, while 40 oz treats 800 gallons (Archoil two-pack) suits heavy-duty needs.
- Ease of Use: Go for pour-and-go formulas (like Hot Shot’s LX4 or STA-BIL). Avoid complex steps—just add to the tank and drive worry-free.
- Cold-Weather Protection: For winter, choose additives with anti-gel properties (Archoil AR6300). They prevent fuel gelling and keep engines starting smoothly in the cold.
- Brand Trust: Stick with OEM-approved brands (Stanadyne) or those with proven lab/road tests (Archoil). Trusted names mean reliable results and less guesswork.
Final Tip: Prioritize your engine’s needs—high-mileage? Pick injector cleaners. Cold climates? Grab anti-gel additives. Always check treatment ratios to avoid overuse or waste.