A method of operating a hybrid vehicle propulsion system includes selectively operating the engine to consume fuel stored on-board the vehicle based on a residence time of the fuel stored on-board the vehicle and further based on a profile of ambient conditions over the residence time. The system comprises one or multiple abuse sensors that are co-located with the product units or their containers, one or multiple readers for capturing sensor data, a data transfer utility for dispatching the recorded data to a database and an analysis module. The device further comprises a latching mechanism for engaging the bulb portion of a compact fluorescent light bulb, whereby the latching mechanism is located on the light bulb receiving portion and facilitates removal of a compact fluorescent light. The machine is further operative to output a maintenance user interface, through a rear display device.