a little research showed it was originally distilled from wood
but to day is MFG thru chemical synthesis using natural gas etc. and Carbon Monoxide
i made a comment about gumming
which is a major compliant from the anti-alky people, those that have had problems
this 'problem' occurs when the alky evaporates leaving behind the compounds it leached out of fuel lines etc.
its NOT from the Alky per-se
i do not know how strong the solvent effects are on 'M' and i would expect automotive grade fuel lines being MFG 'now' to with stand the effects
but i can see where problems could arise with 'vintage' engines and fuel hoses , gaskets etc..