Add 1 fl. Oz. (28.35g) for every 4 gallons (18.18ltr) of gas or diesel fuel.
Allow to sit in a tank for a minimum of 24 hours before using rejuvenated fuel.
Note: Keep spare fuel filters on hand. Tank cleaner will disperse hardened deposits and can load (clog) filters. After two treatments, the fuel tank should be cleaned of all deposits and fuel filters will no longer load (clog) up.