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

If your engine runs on modern low-sulfur gasoline, ethanol blends or ultra-low sulfur diesel, lubricity can be reduced and accelerate wear in fuel pumps and injectors. LX4 is a concentrated, solvent-free formula designed to replace lost lubricating properties, reduce metal-on-metal wear, and help maintain smooth fuel-system operation without harmful alcohols or solvents.

How does LX4 protect fuel pumps and injectors?

LX4 increases fuel lubricity—measured improvement up to 56%—so moving parts within pumps and injectors receive a protective film that reduces friction and abrasive wear. Regular treatments help prevent premature component failure that can result from dry or low-lubricity fuels.

• Restores lubricity lost in ultra-low sulfur fuels
• Forms a friction-reducing barrier on metal parts
• Compatible with common fuel system materials

Will LX4 work with my gasoline, ethanol blend, or diesel?

Yes. LX4 is formulated to be versatile across fuel types, including gasoline, ethanol blends and diesel, so one product can be used for mixed fleets or small engine equipment. It also works alongside fuel stabilizers and other system treatments when used as directed.

• Safe for gasoline, diesel and ethanol-containing fuels
• Mixes readily without phase separation
• Compatible with most fuel additives and stabilizers

Is LX4 safe for modern engines and fuel systems?

Hot Shot's Secret LX4 avoids harmful solvents and alcohols, reducing risk to seals, gaskets and sensor-equipped systems. Its chemistry is intended to protect, not degrade, fuel-system components when used at recommended doses.

• Formulated without alcohols or aggressive solvents
• Designed for use with modern emissions and fuel-system hardware
• Non-corrosive to common fuel-system materials

How often should I use LX4 and what dosing is recommended?

Frequency depends on fuel quality and operating conditions: many users add LX4 each fill-up or every few tanks in high-stress or ethanol-prone environments. Follow label dosing for your tank size to achieve the intended lubricity improvement without overdosing.

• Use per product label dosing for proper concentration
• Frequent use recommended in ethanol-rich or low-lubricity fuels
• Works as a preventive treatment and during maintenance intervals

Who is this for: LX4 is aimed at vehicle owners, fleet managers, and equipment operators who use gasoline, ethanol-blend fuels, or ultra-low sulfur diesel and want to protect fuel pumps, injectors and upper-cylinder parts from wear. It's also suitable for seasonal equipment, marine engines, and anyone seeking a solvent-free lubricity treatment that pairs with stabilizers and other fuel additives.