When our iMiEV's first came out back in 2012, we had a couple guys experiment with them to see if they would extend the high speed range of the car. They installed 6 or 8 of them across the back end, but they made no actual measurable difference - I *think* they probably have a bigger effect at higher speeds than our freeway speeds, but even on an airplane at 150 or 200 mph, I suspect any improvement would be difficult to actually measure - 2 or 3% maybe. On your Volt, I think you might possibly see a freeway improvement of 1 extra mile of battery range, but that's not going to solve your problem . . . . but then, that would be about a 3% improvement and even that much is probably more than you would realistically get, *if* you could accurately measure the change which is so hard to do, given all the other variables which you can't control
Don
Don
