Just thought I would chime in. I have been using 92 octang ethanol free gas for over 2 years. My Z got from 1 to 3 extra mpg without the ethanol. Also ethanol-free gas stores better as well. This is important for my emergency generator and lawn tractor. I am a total convert to non-ethanol gas. I have had no problem with water in my gas line or tank, btw.
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