We just got this info in and the test was done by Yam tecks. They ran a Z520 with 39 gallons of fuel, trolling motor, three batteries and two guys. Top speed was 73.2 mph at 5800 rpm, burning 22.3 gallons per hour and getting 3.28 mpg. Running at 2500 rpms it burned 4.9 gph and got 5.04 mpg. It took 4.10 seconds to plane off and 5.62 seconds to get from 0 to 30 mph. I thought this might answer some questions.