An unanswered source request about Graf Spee's fuel plant

Where could a researcher find detailed information on Admiral Graf Spee's fuel-processing plant and its limitations?

No source is identified. A participant recalls it as a range extender that could not replace replenishment.

A request for detailed sources on Admiral Graf Spee's fuel-processing plant receives no website or publication recommendation. One participant offers only a qualified recollection that the plant extended range. In that account, its output could not sustain operations without replenishment. No detailed description of the plant or its fuel inputs is supplied.