I did a 1000 mile door to do drive from VT to NC and back a few weeks ago. Cool on the way down(40s to 60s). Warm on the way up 70s-80s. Temperature and wind make the most difference. 299kwh, 299wh/mi on the way down and 255kwi, 264Wh/mi on the way home. 17 hours, averaged 62.5MPH...