Hemp biomass as a source of fuel is the most under exploited use of hemp, due to the fact that is economically unfeasible. Hemp stalks can be used in the generation of energy through a process called 'chemergy" which is a cross between chemicals and energy. The hemp stalk can be converted to a charcoal-like substance through a process called pyrolysis, and used for power generation and to produce industrial feed stocks.
Auto giant Henry Ford was a pioneer in the pyrolysis process, and operated a biomass pyrolytic plant at Iron Mountain in Northern Michigan. Hemp as an auto fuel is another potential use. Almost any biomass material can be converted to create methanol or ethanol, and these fuels burn cleanly with less carbon monoxide and higher octane. In fact, the diesel engine was invented to burn fuel from agricultural waste yet ended up burning unrefined petroleum. Hempseed oil can be refined to produce a type of hemp gasoline.
Dave's not here, man.
Oil?
Yup, oil. Like vegetable oil, etc. Along those lines.