Abstract: A self powered low oil level indicator. The device includes a dipstick extending downward from a cap, and it replaces stock oil reservoir caps on mechanical devices which have oil reservoirs and in some cases have oil fill tubes. The indicator dipstick has a first end, a second end, and a longitudinal axis. An electrical circuit is provided including electrical conductors, a battery, an indicating light, and a switch having an electrically conductive on-off element. A float configured for carriage of the electrically conductive on-off element is provided at or near the lower end of the dipstick. When the float displacement is lowered by low oil level, the electrical circuit is completed, allowing the battery to energize a warning light.