ultimate low cost fuel option, widely used in 1929 to 1946 difficult period
https://en.wikipedia.org/wiki/Wood_gas_generatorbut, every few thousand miles you have to clean up the byproduct tar from every nook and cranny in fuel lines and carburetor jets.
Works best with least tar using the nearly pure carbon from charcoal, petroleum coke, steel-making coke, etc
sample quote
A 2010, Mother Earth News article discussed and showed pictures of a wood gas powered engine installed in a pickup truck.[17] As part of the BBC science series "Bang Goes The Theory", a Volkswagen Scirocco was converted to a design by Martin Bacon to run on used coffee grounds, and after its build in 2010 was driven solely on coffee from London to Manchester successfully. Part of the team are now working on a more advanced design leaning towards top speed as opposed to range.
On September 14, 2011, at the Bonneville Salt Flats a truck modified with a wood gas powered engine set a new world speed record for vehicles powered by wood gas with a speed of 73 mph.[18]
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