Diesel Car Engine Treatment: Add to Fuel Tank - Restores Mileage Improves Ignition Like New with Unique Detergent (Treats One Diesel Car) Make Your Car New. Improves engine performance and reduces knock, noise, misfire, ignition delay and crank time. Reduces moisture condensation in fuel tank. Helps prevent corrosion in the fuel tank and fuel lines. Helps reduce exhaust emissions and results in easier cold starts and better warm up. Use 1 Bottle In Full Tank. Suggest 2 BOTTLE To Clean