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

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

Modern low- and ultra-low sulfur fuels reduce natural lubricity, which can accelerate wear in fuel pumps and injectors. LX4 Lubricity Extreme is engineered to return lost lubricity—by as much as 56%—without solvents or alcohol, making it safe for emissions systems and a straightforward way to defend fuel system components in gasoline and diesel engines.

How does LX4 protect fuel pumps and injectors?

LX4 adds a lubricating layer to fuel, reducing metal-to-metal contact inside high-pressure pumps and injectors. That extra lubrication minimizes scarring and wear, helping parts last longer under heavy use.

• Increases fuel lubricity up to 56% to reduce component friction
• Targets wear-prone areas like fuel pumps, injector tips and upper cylinders
• Helps maintain smooth fuel delivery in ultra-low sulfur diesel (ULSD)

Will LX4 work with my diesel or gasoline vehicle?

Yes. LX4 is formulated to function with ULSD, regular diesel and gasoline; it can be used as a diesel fuel additive or gas treatment. It’s compatible with common heavy-duty applications and everyday passenger vehicles.

• Recommended for farm equipment, semi-trucks, pickups and passenger cars
• Works with GM Duramax, Ford Powerstroke and Ram Cummins engines
• Safe to combine with fuel stabilizers and other fuel system treatments

Is LX4 safe for emissions and engine systems?

Hot Shot's Secret LX4 contains no solvents or alcohol, reducing the risk of harming emissions control components. The formula is designed to add lubricity without interfering with emissions systems or sensors.

• Free from harmful solvents and alcohol to protect emissions hardware
• Safe for catalytic converters, particulate filters and oxygen sensors
• Designed for use in both modern and older fuel systems

How do I use the 16 oz bottle and dosing guidelines?

Each 16 oz bottle is concentrated for multiple treatments; follow label directions for precise dosing by tank size. LX4 is simple to pour into the fuel tank before filling or add to the tank and then top off to ensure proper mixing.

• Dosage scales by tank capacity—refer to the product label for exact ratios
• Can be used routinely or when switching to low-lubricity fuel
• Compatible with routine maintenance schedules and seasonal storage

Who this is for: LX4 Lubricity Extreme is designed for vehicle owners and fleet managers who use low- or ultra-low sulfur fuels and want to protect high-pressure fuel systems from premature wear. It’s especially useful for owners of diesel trucks, heavy equipment and any gasoline or diesel vehicle susceptible to reduced fuel lubricity. If you value longer component life, fewer injector or pump failures, and a no-solvent, emissions-safe treatment, LX4 is a practical addition to routine fuel care.