Lucas Upper Cylinder Lubricant. Injector Cleaner. Treats one tank up to 25 gallons. Services Gasoline or Diesel. Use full time for MAXIMUM power & fuel ecomomy. Eliminates need for higher octane fuel. Safe for any Engine. Cleans and lubricates carburetors, injectors and valve seats. Lubricates rings for longer cylinder life. Fouled injectors can cause: 1. Loss of fuel ecomomy 2. Loss of power 3. Burned pistons 4. Premature overhauls Directions: Pour entire contents of bottle into fuel tank before or after fueling. Non-Solvent Formula Copyright 2000-2010, H.D.I. Management Inc. Nevada, USA all rights reserved, All logos, Trademarks, & Copyrights are property of their respective owners. Lucas TU-5.25 Oz.