That is a really interesting question … my indicated range is drifting downwards (I tend to leave it on percentage now). 5 weeks in, the car initially read 274, yesterday on a full 100% charge it read 259 miles. I am not overly concerned given the 8 year warranty on the battery and motor, but thought I would give Tesla a call anyway. I suspect Tesla receive a lot of calls on this. Bear in mind my journeys are very ’samey’ and typically involve motorway. I was told that the indicated range will change over time as the car adapts to my driving style, types of journey, outside temperature and perhaps some other stuff, but I can’t remember what else. I was told to expect this type of fluctuation and that it will more than likely go up as conditions change (summer, different drives etc) … so we will see. I know the characteristics of LFP battery makes range prediction difficult in any case. So, rightly or wrongly, like I said, I am not overly concerned about what the indicated range is telling me, for the moment at least. I now leave it on percentage, I 100% charge when it goes down to around 50% (the Tesla guy was pretty adamant about 100% charging), unless the sun is shining (we have solar panels) in which case the car goes on charge irrespective of the level of battery depletion. At the moment I am doing just over 4 miles per kWh (240 mile range roughly), on a warmer day I did see nearer 5 miles per kWh (equating to nearer 300 mile range). So in summary, maybe the quoted ranges should probably be used more for comparing one vehicle against another rather than a true indicator of range. Washed the car yesterday …. again