> The e10 is about the same as running a tank with HEET or another gas "dryer"

In Colorado we had MTBE for 2-3 years starting about '88.
Then E10 since--from November 1st to March 1st.  That's
only in the front range area of Colorado.

Before, I almost always had a freeze-up early each winter
in my '81 air-cooled. A can of Heet would fix it.  With the
ethanol mix, I have never had a freeze-up, assuming the ethanol
was keeping any water from building up in my tank.  Of course,
this is a dry climate where condensation is not a big problem.

The MTBE was a big problem and very unpopular with FI cars--
like Volvos--because it softened lots of gunk in the tank or
lines.  Most gas didn't have much in the way of cleaning
additives in those days.  Colorado gave up MTBE because--we
have corn farmers....

Richard
Boulder