Hot Shot's Secret LX4 Fuel Additive 32 oz — Restores Fuel Lubricity, Protects Pumps & Injectors

Hot Shot's Secret LX4 Lubricity Extreme is a 32 oz fuel additive engineered to restore and increase fuel lubricity, protecting pumps, injectors and upper-cylinder components in gasoline and diesel engines.

Modern low-sulfur fuels and ethanol blends can reduce natural lubrication that protects critical fuel-system parts. LX4 is formulated to reintroduce lubricating properties without using solvents or alcohols, helping reduce wear in fuel pumps, injectors, and upper-cylinder areas. It’s compatible with gasoline, ethanol blends and diesel, and it can be used alongside fuel stabilizers and other treatments.

How does LX4 protect fuel pumps and injectors?

LX4 increases the lubricity of treated fuel to reduce friction on moving parts inside pumps and injectors. Less friction lowers the chance of premature wear and helps maintain consistent fuel delivery and spray patterns over time.

• Boosts fuel lubricity up to 56% compared to untreated fuel.
• Forms a protective film on metal surfaces to reduce metal-on-metal contact.
• Safe for use in both mechanical and high-pressure common-rail systems.

Will LX4 work with ethanol fuels and ultra-low sulfur diesel?

Yes—LX4 is designed to restore lubrication lost when sulfur is removed or when ethanol dilutes fuel’s natural lubricity. It’s effective in gasoline, E10/E15 blends, and ULSD, bringing back the protective qualities that those fuels often lack.

• Compatible with gasoline and diesel formulations, including ethanol blends.
• Replaces lubricity removed during desulfurization or by ethanol blending.
• Can be added at each fill-up or as part of routine maintenance intervals.

Is LX4 safe to use with other fuel treatments and engine types?

LX4 is free of harmful solvents and alcohols, formulated to avoid damaging seals and components. It mixes readily with fuel and can be used alongside stabilizers or injector cleaners without adverse interactions when used as directed.

• Formulated without alcohols or harsh solvents for broad compatibility.
• Works in gasoline and diesel engines, including turbocharged and direct-injection units.
• Can be combined with fuel stabilizers and cleaners for comprehensive fuel-system care.

Who is this for? LX4 is aimed at drivers, fleet managers, and equipment operators who want to reduce wear in fuel systems caused by modern fuels—especially those using ethanol blends or ultra-low sulfur diesel. It’s useful for daily drivers, long-haul trucks, farm equipment, marine outboards, and any vehicle where preserving fuel-system components and consistent engine performance matters. Use LX4 when you refill or as part of scheduled maintenance to help extend the service life of pumps and injectors without changing engine hardware.