XLP Diesel Fuel System Cleaner 1 Gallon Unit (Treats 600 Gallons) XLP Diesel Fuel Additive helps demulsify normal amounts of water in diesel fuel. It also provides corrosion protection of the fuel storage and transfer system while improving winter operability by lowering the cold filter plugging point by as much as 32 degrees. Use one gallon of cleaner per 600 gallons of fuel (approx. 1 fl. oz. per every 5 gallons). As the sulfur content of diesel fuel has been reduced from 5,000 to 500 to 15 parts per million, the lubricating characteristic of diesel fuel has also been reduced. XLP diesel additive provides additional lubricity to help exceed ASTM D6079 and to help meet the Engine Manufacturers Association recommendation. XLP diesel additive can also help extend the storage life of diesel fuel by improving the thermal and oxidative stability. Conditioning your engines insides with XLP Diesel Fuel System Cleaner can result in better mileage, fuel savings, and improved engine performance. Can bring gel point down 32 degrees from base.