U.S. Lube IDT6000-CS - Upper Cylinder Lube And Injector Cleaner - Cleaner Blends With Gas or Diesel Fuel - (Case of 4 Gallons) 1oz. treats 3 gallons. U.S. Lube Upper Cylinder Lube & Injector. Cleaner blends well with gas or diesel fuel. Available in gallon, quart, and 6-ounce bottles. Cleans entire fuel system. Dissolves carbon, gum, and varnish Increases power for better mileage Reduces heat and friction Maintains lubrication specs