I've had efficiency of up to 5.5 miles per kwh recently, which would give about that if a whole trip was at that efficiency. I've never reset the trip computer since I got the car in Sept 22. The equivalent 100% (I divide the miles showing by the remaining battery percentage and then multiply by 100) range I have been getting in the last month is between 270 to 300 miles (if its warmer outside, its the higher end). Its currently showing 153 miles at 53% battery.