Shell's advanced formulation is designed to work under the extreme conditions of the fuel injection system, breaking down and cleaning away harmful gunky deposits.
Because the gourds must reach such a gunky state to become suitable for art, she doesn't recommend finished pieces be used for anything but decorative, non-food purposes.
Laugh all you like, but when you (inevitably) find yourself trying to clear that persistent, gunky feeling from your throat, know it's only a matter of time before you're next.