Performance Formula Diesel Fuel Additive, 5 Gallon Pail, Treats 2,500 gallons diesel fuel per Pail Cold Weather Protection: Reduces #2 diesel fuel pour point by up to 40F (22C) and cold filter plug point by up to 25F (13C), depending upon base fuel Hot Weather Protection: Lubricates and cetane improver help when fuel is hot and "thin" Increases Horsepower: With up to 5 point cetane gain, resulting in better acceleration, power, etc. Improves Fuel Economy: Independent tests have shown up to 8% improvement in MPG Easier and Faster Start-Up: In cold weather, when fuel can gell or very hot conditions, when fuel viscosity is low