Prevents gum, varnish, rust and corrosion in the fuel system and combustion chamber Keeps stored gas fresh indefinitely For use in all 2-cycle and 4-cycle engines Recommended by 20 top engine manufacturers 4 oz treats 10 gals 8 oz treats 20 gals 10 oz treats 25 gals 32 oz treats 80 gals 1 gal treats 320 gals