Lucas Fuel treatment complies with the federal low sulfur content requirements for use in diesel motor vehicles and nonroad, locomotive, and marine diesel equipment engines. A concentrate of our regular fuel treatment plus anti-gel. Lucas Extreme Cold Weather Fuel Treatment was developed to eliminate fuel gelling problems in the most extreme conditions. It contains all the important additives of our regular fuel treatment to increase fuel mileage and performance. Key Benefits Prevents fuel thickening Lubricates fuel for increased MPG One half gallon treats 250 gallons of fuel