My car was rated at 259 (MS 75D 2017) BUT I installed the 21" wheels so I was getting about 249ish NEW. Now 2 years and 21k miles I'm getting about 245 avg, so that is about 1.6% loss or 98.4% . I charge at work 90% of the time at 32amp 208V.
I've also noticed if I drive normal, I avg 280w/mile...