Best Diesel Fuel Lubricant for Different Diesel Setups

#1 · Best Overall

1. Hot Shot's Secret LX4

Best for: ULSD lubricity treatment.

Why it ranks #1: Its listed feature claims up to 56% higher lubricity, and the one-gallon liquid format supports ongoing treatment of diesel and gasoline vehicles.

Up to 56% increased fuel lubricity is the defining claim for Hot Shot’s Secret LX4, giving diesel and gasoline vehicle owners a treatment focused on adding lubricity back to ultra-low-sulfur diesel. Its gallon bottle suits buyers who want a larger supply of liquid additive for use across compatible fuel systems.

LX4 is formulated without solvents or alcohol, a feature that supports use across all systems and engines according to the supplied product information. Its stated lubricity increase of up to 56% addresses the reduced lubricity of ultra-low-sulfur diesel and is intended to add protection for fuel pumps and injectors. The one-gallon bottle provides a larger quantity for ongoing treatment, while the product’s listed recommended uses include both diesel and gasoline vehicles.

Skip it if you need a stated dose or gallons-treated figure; Archoil AR6500 provides per-bottle treatment coverage.

LX4 suits owners seeking a liquid lubricity additive for diesel or gasoline vehicles, especially those treating ultra-low-sulfur diesel. Its gallon bottle is a substantial supply, but the supplied details do not specify a dosing rate or coverage.

Listed on Amazon as: Hot Shot's Secret LX4 Lubricity Extreme Fuel Additive, 1 Gallon

#2 · Best Stated Capacity

2. Archoil AR6500 Diesel Treatment

• Weight: 6.29 lb

Best for: High-volume fill-up treatment.

Why it ranks #2: The two 40-ounce bottles treat up to 800 gallons total, and the product lists a 43% lubricity improvement plus injector and deposit-control functions.

Two 40-ounce bottles that treat up to 800 gallons total make Archoil AR6500 a practical choice for owners planning repeated fill-up treatments. The product combines a stated 43% lubricity improvement, tested to ASTM D6079, with injector cleaning and DPF and turbo deposit control.

Each bottle treats up to 400 gallons, and the instructions call for adding the treatment directly to the tank at each fill-up. That setup gives frequent users a clear recurring workflow, with two bottles covering up to 800 gallons in total. Archoil lists the formula for light- and heavy-duty vehicles and equipment, including modern HPCR systems. Its lubricity improvement is tested to ASTM D6079, while the title also identifies injector cleaning and DPF and turbo deposit control.

Skip it if you want a single clean-then-maintain kit; Archoil AR6400-D and AR6500 provide those two treatment steps.

AR6500 fits diesel owners who want a repeatable fill-up routine across vehicles or equipment, including HPCR systems. Choose it for ongoing treatment and deposit control; it is not presented as a separate deep-clean-first kit.

Listed on Amazon as: Archoil AR6500 Diesel Treatment (40 oz) Two Pack – Treats 800 Gallons, Diesel Fuel Additive – Lubricity Improver, Injector Cleaner, DPF & Turbo Deposit Control, Cetane Booster

#3 · Best Pump Kit

3. Opti-Lube XL Xtreme

• Weight: 4 oz

Best for: Pump-kit ULSD treatment.

Why it ranks #3: This one-gallon ULSD lubricity additive includes a pump kit; its guidance excludes use in temperatures consistently below 32°F.

The included pump kit sets Opti-Lube XL apart for owners handling a gallon of diesel additive, making dispensing part of the package. Its stated focus is improving the lubricity of ultra-low-sulfur diesel, with fuel economy also identified as a benefit for truck operators.

Opti-Lube says XL increases the lubricity properties of ultra-low-sulfur diesel, addressing the fuel-lubrication concern that motivates many diesel additive buyers. The gallon container paired with a pump kit gives users a dispensing tool alongside the larger supply, which can support repeated treatment without relying on a separately sourced pump. The listing also identifies improved fuel economy as a product benefit, though it does not provide a numeric result or treatment coverage figure.

Skip it if you regularly operate below 32°F; Opti-Lube XPD is the listed all-season alternative.

XL suits truck owners seeking a pump-kit-equipped gallon of additive for lubricity support with ultra-low-sulfur diesel. Its stated cold-weather boundary matters: the product is not intended for temperatures consistently below 32°F.

Listed on Amazon as: Opti-Lube XL Xtreme Lubricant Diesel Fuel Additive, 1 Gallon + Pump Kit

#4 · Best Pint Format

4. Stanadyne Lubricity Formula Two-Pack

• Weight: 1.9 lb

Best for: Dry-fuel lubricity support.

Why it ranks #4: Each 16-ounce bottle treats 125 gallons, and the formula is intended for ULSD and biodiesel blends up to B20.

Five times more lubricating content than other Stanadyne additives is the stated distinction of this Lubricity Formula. It is recommended when excessive wear is a concern and is formulated for ultra-low-sulfur diesel, with use also listed for biodiesel blends up to B20.

The product targets owners concerned about excessive wear, with its extra-strength lubricity positioning aimed at very dry or winter-blend fuels such as jet fuel, kerosene, or No. 1 diesel. Stanadyne also lists injector and fuel-system cleaning and protection, plus water demulsification to support filter and separator efficiency. Each 16-ounce bottle treats 125 gallons, giving buyers a clear dosing coverage figure; the two-bottle listing provides that treatment in a smaller package than a case.

Skip it if you need more supply on hand; Stanadyne Lubricity Formula case of 12 provides twelve 16-ounce bottles.

This two-bottle formula suits diesel owners addressing excessive wear or very dry fuels, with stated compatibility through B20 and 125-gallon coverage per bottle. Choose a larger supply if 250 gallons of listed coverage is not enough.

Listed on Amazon as: Stanadyne Lubricity Formula Pint Bottle | Pack of 2 Bottles (16 oz 38560

#5 · All-Season Formula

5. Opti-Lube XPD

• Weight: 8.25 lb

Best for: All-season pump-kit additive.

Why it ranks #5: The all-season gallon product lists increased ULSD lubricity and includes a pump kit, with a stated note that results depend on base fuel.

Opti-Lube XPD combines an all-season diesel formula with an included pump kit, giving owners a gallon-format additive for recurring dispensing. The listed benefits include increasing ultra-low-sulfur diesel lubricity, improving fuel mileage, keeping the tank clean, and enhancing truck performance.

XPD’s all-season designation makes it a fit for users seeking one formula across changing seasons, while the supplied legal note says results depend on base fuel and bio-blends have a higher cloud point than ULSD. The pump kit accompanies the gallon container, supporting repeated dispensing from that supply. The product description identifies lubricity, fuel mileage, tank cleanliness, and truck performance as benefits, but does not provide numeric results for those outcomes.

Skip it if you need a stated lubricity improvement percentage; Hot Shot’s Secret LX4 lists up to 56%.

XPD suits truck owners seeking an all-season, pump-kit-equipped additive for recurring diesel use and lubricity support. Its stated benefits depend on base fuel, and the listing specifically notes bio-blends have a higher cloud point than ULSD.

Listed on Amazon as: Opti-Lube XPD All-Season Diesel Fuel Additive, 1 Gallon + Pump Kit

#6

6. Archoil Diesel Fuel System Kit

Best for: Clean-then-maintain diesel kit.

Why it ranks #6: The kit pairs a 12-ounce cleaner for 30–40 gallons with AR6500 treatment for up to 400 gallons, providing a clean-then-maintain routine.

A two-step sequence distinguishes this Archoil kit: use AR6400-D first for a deep clean, then AR6500 at each fill-up for maintenance. That division gives diesel owners a defined transition from initial fuel-system cleaning to ongoing treatment, with compatibility listed for modern HPCR systems.

AR6400-D is the first step: its 12-ounce dose treats 30–40 gallons for a deep clean. The 40-ounce AR6500 follows at fill-ups and treats up to 400 gallons, creating a specific clean-then-maintain workflow rather than a single treatment stage. Archoil lists the kit for all diesel vehicles and equipment, including pre-emissions vehicles and modern high-pressure common-rail engines. The combination also identifies injector cleaning, lubricity improvement, and DPF and turbo deposit control as treatment goals.

Skip it if you only need ongoing fill-up dosing; Archoil AR6500 two-pack treats up to 800 gallons without the separate cleaner step.

This kit suits diesel owners planning an initial deep clean followed by recurring treatment, including those with HPCR equipment. It requires two steps, so it is a better fit for a reset-and-maintain routine than a single-stage additive need.

Listed on Amazon as: 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

#7

7. Hot Shot's Secret EDT

• Weight: 16 oz

Best for: Everyday cetane treatment.

Why it ranks #7: This 16-ounce everyday diesel treatment lists cetane improvement of up to 7 points and is positioned for routine engine-performance maintenance.

A cetane boost of up to seven points is the concrete draw of Hot Shot’s Secret Everyday Diesel Treatment, linking regular use with the listed goals of better fuel economy and engine maintenance. Its 16-ounce squeeze bottle is a smaller format for drivers maintaining a recurring treatment routine.

Hot Shot’s Secret positions EDT as an everyday treatment, so it fits drivers who want to add an additive regularly rather than reach for a product only for a one-time reset. The listed cetane increase of up to seven points is tied to better fuel economy and reduced maintenance costs in the product description. Its 16-ounce squeeze bottle provides a compact liquid format, while the supplied information does not state how many gallons one bottle treats.

Skip it if you need stated gallons-per-bottle coverage; Archoil AR6500 specifies up to 400 gallons per 40-ounce bottle.

EDT fits diesel drivers looking for a small-format treatment for regular use, with a stated cetane boost and fuel-economy aim. The listing does not provide a gallons-treated figure, so it offers less dosing clarity than products with explicit coverage.

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

#8

8. Power Service Diesel Kleen

• Weight: 4 lb

Best for: Injector and pump protection.

Why it ranks #8: Its Slickdiesel lubricator is listed to protect pumps and injectors, while the treatment also targets injector deposits in HPCR and older systems.

Slickdiesel Lubricator is the stated feature behind Power Service Diesel Kleen’s fuel-pump and injector wear protection, addressing wear associated with poor-quality ultra-low-sulfur diesel. The 64-ounce treatment also cleans dirty injectors and is listed for both HPCR and older diesel systems.

Power Service identifies cleaning of internal and external injector deposits, with the goal of helping prevent injector sticking in HPCR and older systems. Its Slickdiesel Lubricator is listed to protect fuel pumps and injectors from increased wear caused by poor-quality ULSD. The treatment is also described as restoring lost power and fuel economy, and its compatibility includes ULSD, biodiesel, and biodiesel blends. The 64-ounce bottle offers a substantial single-container format, though no coverage rate is supplied.

Skip it if you require a stated gallons-treated rate; Archoil AR6500 lists up to 400 gallons per 40-ounce bottle.

Diesel Kleen suits owners seeking injector cleaning and lubricity support across HPCR or older systems, including use with biodiesel blends. The 64-ounce format is substantial, but the supplied listing does not specify treatment coverage.

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

#9

9. Stanadyne Lubricity Formula Case

• Weight: 11.28 lb

Best for: Bulk Stanadyne lubricity supply.

Why it ranks #9: The 12-bottle case uses a formula with five times the lubricating content of other Stanadyne additives; each bottle treats 125 gallons.

Twelve 16-ounce bottles, each treating 125 gallons, make this Stanadyne case a clear fit for high-volume diesel treatment. The Lubricity Formula is recommended when excessive wear is a concern and is formulated for ultra-low-sulfur diesel, with biodiesel compatibility listed up to B20.

The case format provides twelve separate bottles, and the stated rate of 125 gallons per bottle amounts to coverage for 1,500 gallons when used at that rate. The formula is described as an extra-strength lubricity improver for very dry or winter-blend fuels, including jet fuel, kerosene, and No. 1 diesel. It also cleans and protects injectors and fuel-system components and demulsifies water for filter and separator efficiency.

Skip it if you only need a small supply; Stanadyne Lubricity Formula two-bottle pack provides the same 125-gallon-per-bottle coverage.

The case suits fleets, shops, or owners treating substantial diesel volume who want a stated dose and coverage per bottle. Its twelve-bottle quantity is a practical fit only when that larger supply aligns with ongoing use.

Listed on Amazon as: Stanadyne Lubricity Formula Pint Bottle 16 oz, Case of 12 Bottles Treats 125 gallons Diesel Fuel per Bottle.

#10

10. Lucas Oil Fuel Treatment

Best for: Multi-fuel system treatment.

Why it ranks #10: This one-gallon treatment cleans and lubricates fuel systems in both gasoline and diesel engines, but its listed use is less diesel-specific.

Lucas Oil Fuel Treatment is listed for both gasoline and diesel, giving owners of mixed-fuel equipment one additive option for cleaning and lubricating fuel-system components. Its one-gallon bottle supplies a larger quantity for repeated use, while the product also identifies injectors, carburetors, and combustion chambers as treatment targets.

The formula is described as cleaning and lubricating the fuel system, including injectors, carburetors, and combustion chambers. That broad component list may suit buyers maintaining different engine types, and the product is explicitly described for gasoline and diesel fuel. Lucas also lists improved fuel economy, power, and acceleration, connecting fuel-flow and deposit claims to operating goals. The gallon bottle supports having a larger supply available, though the supplied details do not provide a treatment rate or gallons-per-dose figure.

Skip it if you need a stated lubricity improvement percentage; Hot Shot’s Secret LX4 lists an increase of up to 56%.

Lucas Oil Fuel Treatment suits owners maintaining gasoline and diesel engines who want a broad fuel-system cleaner and lubricant. Its component coverage is extensive, but buyers seeking a quantified lubricity result or clear dosing coverage will not find those figures here.

Listed on Amazon as: Lucas Oil 10013 Fuel Treatment – 1 Gallon