A fuel injection system for an internal combustion engine has a lubricity improver supply for adding a lubricity improver to low-viscosity fuel supplied to a fuel injection apparatus of the engine. The multilevel LINC transmitter comprises a multilevel signal component separator, a phase modulator block, a mixer block, an up-converter block, a predistorter and an RF block. The apparatus also includes a blade coupled to the shaft and a blade actuator that causes the blade to translate between extended and detracted positions. When input is received at the input device, the input information may be sent to the attachment processor for processing and transmission to the remote computer via the antenna.