So, are they not putting ethanol in your gas over there?
I recently was able to get some 100% gas on a trip when passing through Oklahoma and I think I could have easily gotten 250 miles from that tank if I was wanting to, but we stopped for lunch and gassed up earlier than needed.
The Germans put "up to" 5% ethanol in the fuel without any indication except a tiny sticker in some pumps. Then they sell the E10 clearly marked, that nobody buys, and it contains "up to" 10% ethanol. Thing is, ethanol contains less energy per volume than good old fuel, so E5 represents an increase of fuel consumption of about 1.5%, and another 1.5% if you put E10.
Let's say E10 is 3% cheaper than pure gas, you spend the same amount of money per km, but more volume of fuel. And the fuel tank in the bike doesn't get bigger, so you have to refuel 3% more often. Doesn't sound much, I know, about 5 miles per tank. But those calculations are made on a family car, not on a high performance engine from a motorcycle.
So, to your question, I always refuel E5, weather I like it or not. There isn't pure fuel anymore over here