LeftieBiker wrote:The most efficient speed is something like 17MPH. That being said, 55MPH is definitely better than 65MPH, and 40-45MPH works well on secondary roads . Since the indicated speed is 2MPH high, I usually set (on my old 24kwh Leaf) the cruise control to 57MPH, and let it drop to 50 on uphills. The bottom line: if you need to extend range, go as slowly as traffic safely allows.
The most efficient speed is assuming no accessory power use, and there isn't a lot of change between the most efficient speed and about 50-60 km/h (30-35 MPH). If you are using heat or AC, the top end of that range can be more efficient because you get where you are going faster and use less energy for climate control. Beyond about 60 km/h the drop in efficiency with increasing speed becomes noticeable, and continues to get worse the faster you go.
LeftieBiker wrote:If you have to go fast, try getting 4 car lengths behind a tractor-trailer, matching speeds, and drafting it. That isn't extremely safe, however...
Will adaptive cruise control on the newer models allow you to get you close enough to make a difference with less reliance on the driver's reaction time?