It's been my experience over the past 70,000+ miles on my 14 RT, that from FULL nozzle insertion and Auto Shut-off, then slowly adding gas until it gets to the RING .... I consistently add ... 1.3 gal .... to achieve MAX gas fill (1.3 gal. is a HUGE variation for a small gas tank) ..... for me this adds 50 miles range to each tank full of gas..... Since I'm rarely more than a max of 10 miles to a gas station, I can easily wait until the gauge shows TWO bars and then fill the tank. .... I mostly ride in State, in the northern half of Vermont...... Mike