Rislone’s EZ Nozzle additive delivery system allows consumers to install fuel additives into “cap-less” fuel tanks. None of the fuel additive bottles currently on the market will open such a system’s safety door. When this tool is inserted into a capless or obstructed fuel tank, the EZ Nozzle opens the fuel system safety door and allows the additive to flow in neatly, with no spilling and no additional equipment required. EZ Nozzle is built right into the top of the bottles used for Rislone’s new Super Concentrated line of fuel additives.