jray3 wrote:Bradley's questions are hard to answer- but we can be confident that the driving mode makes absolutely no difference in energy use during steady-state cruising, it only differs during acceleration and deceleration.
But it does matter. If you have canion get mi/kWh (not summary, but instant) on one of the trip panels. Find a nice hill to coast down in N once you figure out what the steady state N coasting speed is. Start at the top at that speed (holding steady speed) in D and check the instant mi/kWh depending on the grade and magnitude of the SS speed, it will be an impressive number like perhaps 16 mi/kWh. Now drop it into N and it will increase by 8 or 10 fold well over 100 mi/kWH. Even on flat ground and low speed utilizing N as much as possible (but hardly practical) there is a 6% advantage to intermittent N usage.