I usually lose about 3 miles a day, as long as I have the car sleep, 'stay connected' is off, and I don't check on the car with the smartphone app. Otherwise, usage will go up a bit. It can also vary a bit based on ambient temperature or the cycling of your pack on to top off the 12V auxiliary battery.
So you're in the ballpark, but probably a little higher than typical loss--perhaps due to one of my listed reasons.