Description A revolutionary additive based on enzymes that replaces expensive fuel polishing and tank cleaning. Features Exceptional at cleaning sludge and other fuel contaminants from gasoline and diesel tanks A cost-effective alternative to expensive fuel polishing and tank cleaning Directions Add 1 fl. Oz. for every 4 gallons of gas or diesel fuel. Allow to sit in tank for a minimum of 24 hours before using rejuvenated fuel. Note: Keep spare fuel filers on hand. Tank cleaner will disperse hardened deposits and can load (clog) filters. After two treatments, fuel tank should be cleaned of all deposits and fuel filters will no longer load (clog) up.