I'm quite new to the MG community and the forum but find myself becoming increasingly frustrated at the amount of navel gazing which goes on. I'm a retired university lecturer and absolutely appreciate the need for accuracy where that is needed. But I honestly can't see a need to work out the miles/kWh to any greater accuracy than is shown in the dashboard readout.
Surely the important thing is not so much an absolute number to X significant figures. To me, it's more useful to track the trend for your particular car and style of driving. For example, take the mi/kWh for trip A compared to trips B, C, D & E in the same car. What were the characteristics of each trip, in what circumstances does that suggest the car gives better or worse results and, ultimately, how can I use that understanding to maximise my efficiency?
I do, however, understand that my own view isn't universal. If someone likes working out the "correct" way to calculate mi/kWh (or whatever is being discussed in a particular thread) that's perfectly fine. Maybe, as a new member, I should keep my views to myself ?