Towards the end of World War 2, the Japanese began to use pine oil from pine tree roots to fuel their airplanes. Heating the roots and distilling the pine oil took 12 hours and only resulted in ~4 percent crude fuel. – WTF Fun Facts
Source: https://books.google.co.uk/books?id=_fSaDwAAQBAJ&pg=PA258&lpg=PA258&dq=pine+tree+sap+japan+airplanes+ww2&source=bl&ots=A4mzEMlgAt&sig=ACfU3U1_WZom0qKd86pF_ZJcoGmFy8nzfw&hl=en&sa=X&ved=2ahUKEwj67OHlvoPnAhUBTBUIHbWUDfMQ6AEwGHoECAcQAQ#v=onepage&q=pine%20tree%20sap%20japan%20airplanes%20ww2&f=false
jet fuel
air canadas flight ran out of jet fuel during the
Air Canada’s flight ran out of jet fuel during the trip – WTF fun facts