>only 200 proof anhydrous pure ethanol (not denatured) can be used for
>biodiesel. engines running on alcohol will run on much less stringent
>requirements.

I seem to recall that the denaturant used in ethanol is methanol, in 
order to render it unfit to drink and difficult to re-separate. If 
this is true, and if the ethanol is still anhydrous after the 
addition of methanol, then perhaps denatured ethanol might still be 
good for making biodiesel. This needs to be verified.
-- 
...Warren Rekow

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