Sounds like 40-50 MPH and 20-30 C give the highest MPG (not surprising). page 2 in http://avt.inel.gov/pdf/hev/ftr2010prius0462.pdf and http://avt.inel.gov/pdf/hev/ftr2010prius6063.pdf
It's VERY interesting to note the difference between those two test vehicles (VIN: _462 and 6063), ie: VIN: _462 = Cumulative 45.6 MPG VIN: 6063 = Cumulative 43.0 MPG Which: driver techniques (skills or errors), weather differences, or vehicle tolerances?
Probably a combination of effects that could include something as simple as cabin air temperature preferences or the use of cruise control. The trick would be to do a correlation between the reported metrics and summary MPG to see what correlates. Bob Wilson
Ironically, both vehicles are/were being operated in Phoenix, AZ, area as business courier vehicles...and, one of the 'notes' says they were operated with "FULL A/C" which I can readily believe.
