Basics

This page goes over the relevant distinctions between:
- Fuel Alcohol
- Drinkable Ethanol distilled drinks
- Alcohols or co-produced products for use as chemicals

Fuel Alcohol

In most cases (short of jet/rocket engines where small variations in composition can have major consequences) this is the lowest concern variety
Composition/Contaminates are of little issue, outside of perhaps effecting Energy Density , and possibly creating unusual Pollutants (if chlorine or some metal is introduced somehow etc)
Water Content is the main issue