Just got home from filling it up. This tank returned 70mpg. A nice 8 mpg improvement. This was also the 1st time I ran premium, which is what Yamaha recommends.
Went to a station about a mile from the house that I was thinking offered Ethanol free premium. I was wrong. They had a special pump for ethanol free but it was only 87 octane. I got it anyway. I will let you know how it turns out.