I don't know. I got a RTB yesterday with my fuel bunkers reading a healthy 58% remaining...stock1.5 Gold. I had three fish left, which I spent on Targets of Opportunity as I sped homeward..( actually sped home at "Ahead Full" for a change..imagine that
)
...and BTW...using Keys Shift -G and Ctrl-G will tell you the distance to the end of your laid in course and your available remaining distance at current speed..very handy tools those. Plus remember to turn off battery recharging..it is unbelievable how this will extend your range if caught short on fuel.