Hot Shot's Secret LX4 Lubricity Extreme Fuel Additive 16 oz 3-Pack — Restores Lubricity & Protects Pumps and Injectors

Hot Shot's Secret LX4 Lubricity Extreme is a concentrated fuel additive that restores lubricity to low-sulfur fuels and protects pumps, injectors, and upper-cylinder components.

Modern ultra-low sulfur diesel (ULSD) and many ethanol-blended gasoline formulas have reduced natural lubricity, increasing wear on fuel system components. LX4 Lubricity Extreme is engineered to return lost lubrication to those fuels without solvents or alcohol, providing an extra layer of protection for diesel and gasoline engines. This 16 oz 3-pack offers a ready supply for service intervals on trucks, farm equipment, and personal vehicles.

How does LX4 reduce damage from "dry fuel"?

LX4 replenishes lubricating compounds depleted during fuel processing, forming a protective film on metal surfaces inside the fuel system. That film reduces metal-on-metal abrasion in fuel pumps, injectors, and upper cylinders, helping parts last longer under normal operating stress.

• Increases fuel lubricity by up to 56% to lessen component wear
• Coats pump and injector surfaces to minimize scarring and friction
• Works with ULSD, diesel blends, and gasoline used as diesel fuel

Will LX4 harm my emissions systems or engine components?

LX4 is formulated without solvents or alcohol and is safe for modern emissions controls when used as directed. Its chemistry focuses on adding lubricity rather than altering combustion or exhaust chemistry, so it is compatible with common engine and aftertreatment systems.

• No solvents or alcohol that could damage seals or emissions hardware
• Designed for compatibility with catalytic converters and DEF in diesel applications
• Safe to use alongside other fuel system treatments and stabilizers

How and when should I use LX4 to get the best results?

Use LX4 at the manufacturer-recommended dosing interval or during each fill when running low-lubricity fuels. Treating new fuel or topping off a tank with LX4 before extended storage or heavy use helps maintain lubricity and prevents scarring during startup and under load.

• Add according to the directions on the bottle for accurate dosing
• Use with every fill or add during fuel changes and long-term storage
• Compatible with fuel stabilizers; safe to mix with other treatments

Which machines and engines benefit most from LX4?

LX4 is designed for any engine that runs on ULSD, diesel blends, or gasoline used as diesel fuel, especially equipment that sees heavy duty cycles or long idling periods. It’s a preferred choice for commercial trucks, agricultural machinery, and high-mileage personal trucks where pump and injector longevity matters.

• Heavy-duty semis, long-haul trucks, and fleet vehicles
• Farm equipment and agricultural diesel engines exposed to low-lubricity fuel
• Pickup trucks with Duramax, Powerstroke, Cummins, and other diesel platforms

Who is this for? Hot Shot's Secret LX4 Lubricity Extreme is aimed at owners and operators who want to protect fuel system investment and avoid premature component wear—fleet managers, farmers, owner-operators, and drivers of diesel pickups. It’s also useful for anyone storing fuel or operating equipment in regions where ULSD or high-ethanol fuels are common. The 16 oz 3-pack provides multiple treatments for regular maintenance or seasonal protection, offering a simple preventative step to keep fuel systems functioning smoothly.