REV-X Distance + Winter Diesel Fuel Additive (-45&deg;) - 16 fl. oz. Treats 400 Gallons Concentrated - Treats up to 400 Gallons for Unparalleled Cold Start Improvement. Unmatched Winter Performance to -45F (-42.7C) - Helps prevent Diesel Fuel Gelling. Minimum 8 Point Cetane Increase for increases Pulling Power and Torque, Economy and Reduces Exhaust Gas Temperatures. Added Lubrication Agents Keeping Both New and Old Fuel Injection Systems Running Smoothly with Reduced Wear. Added Detergent Agents Make Sure That the Entire Fuel System Stays Clean for Maximum Performance.