Clearly I do not get 4.1 avg L/100km. When I set up the mini stats for the same statistic it calculates the correct average of 9.8. Does anyone one know why the Basic Stats are calcualting wrong? Is it something I entered? I am new here.
I'd say give it some time. You've only added two fuel-ups. We don't even show vehicles in public browsing until they have three fuel-ups. Your numbers are either going to be very high or very low until you have a half-dozen fuel-ups or so.
As for how the number was calculated: you've driven a total 879.02 km. You've put in a total of 36.4 litres. Plug those numbers into an independent online calculator like this one and you get 4.1 L/100km. Your average will even out once you have more fuel-ups.
Ok, It just seems weird that it is missing the 50.17L from the first fill up. The "Mini Stats" has the right number as mentioned above so I would have thought the Basic Stats would be able to calculate it easily. I'll give it time however.
Oh, I see now. The total litres is off. I didn't catch that when I was looking at it.
You marked your first fuel-up as missed for some reason. (Maybe you initially had odometer tracking on?) There's no reason to do that. You only need to mark it as missed if you're using odometer tracking and you missed a reading in a series of readings.
If you remove that from for your first fuel-up you should be set.