Some very impressive fuel readings above, with some based on ‘actual’ calculations. Two questions from the conversations above.
1. Does the MyBMW app, which we now have available in more recent years, calculate the available litres of fuel (which is seen in the home page of the app by the car icon) based on the OBC fuel consumption (that is, max tank capacity minus the OBC consumption x distance traveled), or is it obtained separately, based on a more accurate measure of available fuel? If the latter, then we can use it as a third way of determining the fuel consumption (the first being OBC, and the second being the manual, first principles way based on actual fuel used).
2. The issue I have with the method of filling fuel to determine actual fuel consumption, is how to even do this accurately? The most consistent way I thought of was to fill a tank to ‘first click’, drive for xxx Km, then refill to first click again and then determine the consumption. First click therefore acts as a consistent measurement in terms of fuel used. My concern is whether this first click itself is consistent/absolute? Does it always correspond to a specific, constant fuel volume when activated? Eg 55litres in a 57litre F30? If not, then that will not yield an accurate and consistent fuel consumption measure and so hardly validates claims of ‘actual’ consumption readings.
