I have went all day trolling and moving off shore without ever going below 1/2 a tank. I’m very confident that even though the miles available dash reading changes with current throttle position/RPM that I won’t need extra fuel on any 8 hour trip. Try the different attitudes with your boat and different load outs. You will be really surprised what a good boat we have purchase. But above all, if you’re not comfortable with any part of your setup change it so you can relax and enjoy.