No 32 is right, but my unit analysis sure sucks. ~14.9 kW to stabilize at 65 mph would yield 253 miles of range using 58 kWh. This is probably close with no AC. ~22.0 kW using the same variables at 75 mph would yield 197 miles. This is probably close with no AC. But then why is the difference 32.2%... Owww... You cover more Miles Per Hour at the higher speed. So the real difference is 17.2% more losses PER MILE. Dumb mistake. But still, the Bolt should not be so much more efficient of the Volt at highway speeds due the huge difference in aero drag. That's a lot of waste heat being spewed by the EV system in the Volt.