I entered the last 2 tanks (I forgot to do it a week ago when I finished the previous), both with moderate 2-up ratio (42% and 25%) and both over 83mpg.
I was kinda surprised about the second, Teresa had clutch problems in the beginning, the weather turned cooler, I even got some rain, and had a bit of 2-up offroad riding (was not really intended, but one must explore unknown ways, am I right?
)
They definitely make my average better these days.