Don't know what boat you have experience with, but MY experience with MY B52 is that this boat will indeed empty the tanks at what would be seen as a wakeless towing speed, which by the way could be above 5 mph, depending on the boat you own. I am able to keep things wakeless, and do nearly 8 mph, which would definitely drain the tanks on an MB. Perhaps not all the way to bone dry, but well within any limits of concern. As for towing I have towed plenty of people in their broken down boats, and have never felt to limit myself to only 5 mph. I'd shoot myself first, and probably the boat owner behind me.