@arstechnica I switched my M3 to a simple percentage display right away. Mileage depends on so many factors: speed, temperature, incline, wind (matters a lot!), and driving style. There’s a reason your phone doesn’t say how many hours of battery are left. That said, my car is rated at 310 miles or something, and it gets 250 realistically. My gas cars didn’t get the promised mpg either.