Thinking of making a long run down a river for a tourney and wondering if I should be OK fuel wise. 2015 P4/SHO with spare 10 gal tank. Run is 66 miles one-way.SHO Performance Bulletin for a 225 on a Puma is:RPM MPH GPH MPG3500 35.5 8.7 4.084000 41.9 11.2 3.744500 51.6 13.4 3.855000 61.3 14.6 4.205500 68.8 18.7 3.686000 75.1 20.9 3.59I probably wouldnt turn over 5000 very often. I think I should be OK, but I tend to be a little paranoid. Anyone have any specifics?