Cottonwood
Roadster#433, Model S#S37
Due to motor and inverter inefficiencies, I would expect consumption to be higher than 6 miles/1k'. But only by about 20%.
One direction batteries to potential energy should probably be closer to a 10% loss; a round trip battery to kinetic/potential back to battery or grid to battery to kinetic/potential is more like 20% loss. Anyway, 10-20% of 6 miles/1,000 feet pushes the number to about 7.
I find that if I use GPS altitude from my iPhone and watch as I go up and down mountains, the 6-7 miles per 1,000 feet tracks within a couple of miles on big ups and downs. My Pagosa to Boulder drive crosses the continental divide three times, Wolf Creek, Fremont, and the Eisenhower Tunnel, with Poncha Pass thrown in for good measure. I do that drive or the other way, once or twice a month and it gives me lots of chances to do the mental math as I drive. :wink: