Looking for the best lubricity improver to enhance your diesel engine’s performance? We’ve compiled a list of 10 top-rated products, including powerful formulas from Archoil and UNICLEAN, to help you maximize efficiency, reduce wear, and protect vital engine components.
Diesel engines demand smooth operation and long-term protection. Lubricity improvers tackle wear, boost performance, and keep fuel systems clean.
Archoil and UNICLEAN deliver powerful formulas for tough deposits and cold-weather reliability. These additives restore power, cut fuel costs, and shield vital parts like CP4 pumps.
Choosing the right additive changes the game. Archoil AR6500 boosts cetane by 8 points. UNICLEAN’s 10X formula fights friction like no other. Your engine deserves this care. Maximize efficiency—read on to find your perfect match.
List of Top 10 Lubricity Improver
| Image | Title | Best For | Price |
|---|---|---|---|
 |
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 Archoil Diesel Fuel System Kit is perfect for any diesel owner who wants to restore their engine’s peak performance. It’s designed for all diesel engines, from modern trucks to older equipment, ensuring a smoother ride and better fuel economy. |
|
 |
Archoil AR6500 Diesel Treatment (40 oz) Treats 400 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster |
This Archoil AR6500 Diesel Treatment is perfect for all diesel engine owners looking to boost performance and protect their investment. It’s ideal for anyone who wants smoother running, better fuel economy, and longer-lasting engine parts with easy, every-fill-up use. |
|
 |
Archoil AR6500 Diesel Treatment (40 oz) Two Pack – Treats 800 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster |
This diesel treatment is perfect for anyone who wants to keep their diesel engine in top shape. It’s great for drivers of pickups, SUVs, vans, RVs, and heavy-duty trucks, as well as equipment owners looking to improve performance and protect their fuel system. |
|
 |
Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 5X Stronger I Made in USA I Size : 16 FL OZ |
Diesel car or truck owners who want five times stronger fuel protection will love this additive. It boosts lubricity to keep engines running smoothly and reduce wear. Perfect for anyone using all diesel fuels, from old trucks to modern vehicles. |
|
 |
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 |
Diesel vehicle owners in cold climates need Archoil AR6300. It prevents gelling, boosts cetane, and keeps fuel systems clean with easy one-bottle use. |
|
 |
Archoil AR6300 Winter Diesel Treatment (41 oz) Treats 275 Gallons, Diesel Anti-Gel Additive, Lubricity Improver, Cetane Booster, Injector Cleaner, DPF & Turbo Deposit Control |
This product is perfect for diesel vehicle owners who want reliable performance in cold weather. It’s easy to use and works for all diesel engines, from pickups to RVs. |
|
|
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 |
Diesel engine owners who want stronger engine protection will love this additive. It boosts lubricity 10x, reduces friction, and keeps engines running smoothly. |
|
 |
Lubricity Formula Stanadyne 2 Pack of Pint (16 Ounce) Bottles – Stanadyne # 38560-2PK |
This Lubricity Formula Stanadyne is perfect for anyone experiencing excessive wear in their fuel system. It’s designed to clean and protect your injectors and all fuel system parts, offering five times more lubricating content than other Stanadyne additives. |
|
|
Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 5X Stronger I Made in USA I Size : 32 FL OZ |
This fuel additive is perfect for anyone who wants to improve their diesel engine’s performance. It’s 5X stronger and made in the USA, so it’s great for keeping your engine running smoothly. |
|
|
Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 5X Stronger I Made in USA I Size : 2GLN |
This fuel additive is perfect for anyone who wants to give their diesel engine a powerful boost. It’s designed to make your fuel five times stronger, ensuring your engine runs smoothly and efficiently. |
Detailed Reviews
Discover the top 10 Lubricity Improvers handpicked for peak engine performance. Each product is expert-reviewed and backed by real user feedback. Whether you prioritize protection, efficiency, or affordability, this guide has you covered. Find the perfect match for your diesel engine and drive with confidence.
1. 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
Revitalize your diesel engine with this powerful two-step system. It’s designed for a complete clean and ongoing protection. Get your engine running smoother and stronger.
This kit includes a deep-cleaning formula to tackle tough deposits. Then, a maintenance treatment keeps your fuel system in top shape with every fill-up.
Experience improved fuel economy and restored engine performance. This kit is your secret weapon for a happier, healthier diesel.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Archoil Diesel Fuel System Kit is perfect for any diesel owner who wants to restore their engine’s peak performance. It’s designed for all diesel engines, from modern trucks to older equipment, ensuring a smoother ride and better fuel economy.
Ready to Purchase?
2. 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 fuel additive that improves your engine’s performance. It works with all diesel engines, including cars, trucks, and RVs. Simply add it during each fill-up to keep your engine running smoothly.
This treatment boosts cetane levels by up to 8 points for faster ignition and smoother combustion. It also cleans injectors to restore spray patterns, which helps improve fuel economy. Lubricity is improved by 43%, protecting sensitive parts like the CP4 pump.
The AR6500 also helps to keep your DPF clean and reduce regeneration frequency. It prevents soot buildup, keeping your turbo responsive and restoring smoother acceleration.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Archoil AR6500 Diesel Treatment is perfect for all diesel engine owners looking to boost performance and protect their investment. It’s ideal for anyone who wants smoother running, better fuel economy, and longer-lasting engine parts with easy, every-fill-up use.
Ready to Purchase?
3. Archoil AR6500 Diesel Treatment (40 oz) Two Pack – Treats 800 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster
Keep your diesel engine running smoothly and powerfully with Archoil AR6500. This two-pack of diesel treatment is easy to use at every fill-up. Each bottle treats up to 400 gallons, for a total of 800 gallons of protection.
This powerful formula works for all diesel engines, from small pickups to heavy-duty trucks. It improves lubricity by 43% to protect vital fuel system parts. It also boosts cetane up to 8 points for quicker ignition and a smoother ride.
Archoil AR6500 cleans injectors and keeps your turbo clean. This means better performance and improved fuel economy for your vehicle.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This diesel treatment is perfect for anyone who wants to keep their diesel engine in top shape. It’s great for drivers of pickups, SUVs, vans, RVs, and heavy-duty trucks, as well as equipment owners looking to improve performance and protect their fuel system.
Ready to Purchase?
4. Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 5X Stronger I Made in USA I Size : 16 FL OZ
Fuel ADDITIVE Treatment is a powerful solution for your diesel engine. It improves lubricity, making your engine run smoother and more efficiently.
This UNICLEAN AMERICA product is 5X stronger than others. It’s made in the USA and comes in a 16 FL OZ bottle for easy use.
Boosts performance, reduces wear, and saves fuel. A must-have for diesel owners.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Diesel car or truck owners who want five times stronger fuel protection will love this additive. It boosts lubricity to keep engines running smoothly and reduce wear. Perfect for anyone using all diesel fuels, from old trucks to modern vehicles.
Ready to Purchase?
5. 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 treatment that keeps your engine running smoothly in cold weather. It prevents gelling and ensures reliable starts. Just add it to your fuel tank at every fill-up.
This treatment works for all diesel engines, from trucks to RVs. It improves lubricity by 43%, protecting vital parts like the CP4 pump. It also boosts cetane up to 8 points for better performance.
Use AR6300 in winter and switch to AR6500 for year-round care. Store any leftover AR6300 in a cool, dark place for next season.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Diesel vehicle owners in cold climates need Archoil AR6300. It prevents gelling, boosts cetane, and keeps fuel systems clean with easy one-bottle use.
Ready to Purchase?
6. Archoil AR6300 Winter Diesel Treatment (41 oz) Treats 275 Gallons, Diesel Anti-Gel Additive, Lubricity Improver, Cetane Booster, Injector Cleaner, DPF & Turbo Deposit Control
Archoil AR6300 is an easy-to-use diesel additive. Add it to the tank at each fill-up. One 41 oz bottle treats 275 gallons.
It prevents fuel from gelling in cold weather. Keeps diesel flowing for reliable starts. Ensures smooth engine performance in winter.
Works in all diesel engines, including modern HPCR systems. Improves lubricity by 43% to protect fuel parts. Boosts cetane up to +8 for faster ignition and better fuel economy.
Cleans injectors and reduces DPF clogs. Keeps turbo free of deposits for better acceleration.
Switch to AR6500 for year-round use. Store leftover AR6300 in a cool, dark place for next winter.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This product is perfect for diesel vehicle owners who want reliable performance in cold weather. It’s easy to use and works for all diesel engines, from pickups to RVs.
Ready to Purchase?
7. 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 diesel lubricity improver boosts fuel performance. It’s 10X stronger for lasting protection. Made in USA, it meets high-quality standards.
Fuel additives like this one reduce engine wear. They enhance lubricity and improve fuel efficiency.
The 10X stronger formula fights friction. It comes in a 1 liter bottle. UNICLEAN AMERICA ensures reliable results.
| Pros | Cons |
|---|---|
|
|
Perfect For:
Diesel engine owners who want stronger engine protection will love this additive. It boosts lubricity 10x, reduces friction, and keeps engines running smoothly.
Ready to Purchase?
8. Lubricity Formula Stanadyne 2 Pack of Pint (16 Ounce) Bottles – Stanadyne # 38560-2PK
Lubricity Formula Stanadyne boosts fuel system health. It has five times more lubricating content than other Stanadyne additives, cutting wear fast.
This formula cleans injectors and all fuel parts. It’s for tough wear cases and backed by Diamond Diesel, a trusted distributor. Made in the U.S.A. ensures quality you can trust.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Lubricity Formula Stanadyne is perfect for anyone experiencing excessive wear in their fuel system. It’s designed to clean and protect your injectors and all fuel system parts, offering five times more lubricating content than other Stanadyne additives.
Ready to Purchase?
9. Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 5X Stronger I Made in USA I Size : 32 FL OZ
Fuel ADDITIVE Treatment is a powerful solution for your diesel engine. It improves lubricity and keeps your engine running smoothly.
This Made in USA product is 5X stronger than others. It works fast and is easy to use. UNICLEAN AMERICA ensures top performance.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This fuel additive is perfect for anyone who wants to improve their diesel engine’s performance. It’s 5X stronger and made in the USA, so it’s great for keeping your engine running smoothly.
Ready to Purchase?
10. Fuel ADDITIVE Treatment I FOT Lubricity Improver I UNICLEAN AMERICA Fuel Oil & Diesel Lubricity Improver 5X Stronger I Made in USA I Size : 2GLN
Boost your engine’s performance with Fuel ADDITIVE Treatment I FOT Lubricity Improver. This powerful formula is designed to enhance your fuel. It’s made in the USA for quality you can trust.
Experience five times stronger lubricity for your diesel fuel. This means better protection and smoother operation for your engine.
Keep your engine running smoothly and efficiently. Choose UNICLEAN AMERICA for a cleaner, more powerful drive.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This fuel additive is perfect for anyone who wants to give their diesel engine a powerful boost. It’s designed to make your fuel five times stronger, ensuring your engine runs smoothly and efficiently.
Ready to Purchase?
Buying Guide
Diesel engines thrive on smooth performance and lasting care. The right lubricity improver can transform your engine’s health and efficiency.
-
Cetane Boost: Higher cetane means faster ignition. Additives like Archoil AR6500 boost by up to 8 points. This leads to smoother combustion and better performance.
-
Lubricity Improvement: Look for additives that slash wear. Archoil improves lubricity by 43%. UNICLEAN’s 5X or 10X formulas fight friction harder.
-
Deposit Control: Clean injectors and turbos matter. Archoil products tackle tough deposits. They keep DPFs clear for smoother acceleration.
-
Cold Weather Performance: Gel-free fuel is key in winter. Archoil AR6300 prevents gelling. It ensures reliable starts in cold climates.
-
Compatibility: Works with all diesel engines? Check. Archoil and UNICLEAN suit modern systems like CP4 pumps and HPCR.
-
Treatment Frequency: One-time or ongoing? Archoil’s two-step kit (AR6400-D + AR6500) offers deep clean + maintenance. Others treat at every fill-up.
-
Quantity and Value: Sizes vary from 16 oz to 2 gallons. Two-packs treat up to 800 gallons. Bigger bottles save money long-term.
-
Made in USA: Quality counts. UNICLEAN and Stanadyne products are U.S.-made. Trust local standards for reliability.
Pick the additive that matches your engine’s needs. Archoil for cetane boosts, UNICLEAN for extreme friction. Protect your diesel and drive smarter.