possibilities..
==

sounds logical, not when, but has, runs ok,

not enough experience with it to tell, yet, will probably set a pattern,
giving some ideas on what to expect.

mho
vƒe

Get involved.

By the same token, MTBE helps water and gasoline mix, so
there shouldn't be much of a difference with ethanol.  I'd
actually be worried if there was a puddle of separated
water in the bottom of my tank.  An unlubricated slug of
water could be sucked into the fuel pump or injectors
without lubrication.  Even worse, it could freeze in low
temps.  Fuel line water remover/antifreeze usually contain
alcohols, and they're commonly used without problems.

We haven't had MTBE in California for several years.
Besides - up to 10% ethanol has been common in the midwest
for years, and I haven't heard of too many problems.

Modern fuel systems aren't terribly subsceptible to
corrosion.  Even so, most gasline has inhibitors added to
reduce pipeline and tank corrosion.

<http://www.chevron.com/products/prodserv/fuels/bulletin/motorgas/3_refining-test
ing/pg4.asp>

"Corrosion inhibitors are carboxylic acids and carboxylates.
The facilities — tanks and pipelines — of the gasoline
distribution and marketing system are constructed primarily
of uncoated steel. Corrosion inhibitors prevent free water
in the gasoline from rusting or corroding these facilities.
Corrosion inhibitors are less important once the gasoline is
in the vehicle. The metal parts in the fuel systems of
today’s vehicles are made of corrosion-resistant alloys or
of steel coated with corrosion-resistant coatings. More
plastic and elastomeric parts are replacing metals in the
fuel systems. In addition, service station systems and
operations are designed to prevent free water from being
delivered to a vehicle's fuel tank."