I recently found a station in my area with E0, so I am in the middle of my first tank. It's a bit out of the way, and I can only fill up during certain weekday hours before work (cardlock access only during all other hours), but I'm going to try at least one more tank.
The bad news is that this tank of E0 happened to coincide with the beginning of significantly colder mornings in WA, so outside temperature will be a variable.
Oh... I drive a 1994 VX with 210k miles.
Gas log is over at gassavers.org.