More likely to produce methanol than ethanol at a guess.
My reasoning is that it current mainly produces formic acid. In humans formic acid is produced from the chain:
methanol -> formaldehyde -> formic acid
The reactions being triggered by the enzymes alcohol dehydrogenase and aldehyde dehydrogenase respectively.
The chain for ethanol (non-tramp booze) is:
ethanol -> acetaldehyde -> acetic acid.
So from only my hazy memories of how hangovers work and why tramps go blind I deduce that it is more likely to produce meths than single malts.
Of course meths can run cars. There's a campaign for it somewhere. It's not a top tipple though.