FS CLEAN FLOW is designed to:
FS CLEAN FLOW prevents gum formation from both routes and includes extra Intake Valve Detergent to achieve a level 3X the minimum specified (LAC) by the EPA. The combination approach prevents formation of gum, prevents lay down of gum, and disperses coke that may have formed. The detergent has also been selected to prevent depositing/fouling from sulfate contamination from ethanol.
Your engines start clean, clean up, and stay clean.