Unleash the full potential of your diesel engine with Hot Shot's Secret Diesel Extreme Fuel System Additive. Specifically formulated to enhance performance and increase efficiency, this additive is designed for use in all diesel engines and is compatible with both biodiesel and regular diesel fuels. Experience the difference with regular use, as it helps to clean and maintain your fuel system, ensuring optimum performance and longevity. Hot Shot's Secret Diesel Extreme is the choice for drivers who demand reliability and want their diesel engine to run at its peak.