Fuel Additive Dispensing System

A system for dispensing an additive into a fuel is disclosed. The system includes: a tank for holding a fuel additive and a dispenser. The dispenser includes: a main shutoff valve; a bore through which the fuel passes; a float bowl, contained within the walls of the device surrounding the bore; an obstruction located inside the bore of the dispensing device; a seal to prevent the flow of air around the outside of the fuel nozzle pump. The additive tank is connected to the dispenser by a conduit. Gravity causes the additive to flow from the tank, through the conduit into the dispensing device. The main shutoff valve is activated as a device cap is installed and deactivated as the cap is removed. The obstruction causes the additive to be drawn into the flow of fuel within dispensing device.