It would be nice if user could enter just actual kilometers to some date with no fueling. Then it could be considered in travelled distance statistics but not in mileage calculations.
Why i'm asking this is that then id could be possible to enter some historical data just for this statistics. Eg from times when there was no Fuelio :-) Of course it can be useful for users who have vehicle which he is not driving all the time and so fills it just sometimes (once per month or more) but rides just few kms per day or week.
Customer support service by UserEcho