The app you have tried probably also is doing it wrong.It was fixed some time ago. This is a little bit tricky. Many people think.

The right data you need to use to calculate real fuel consumption (for your example is):

1837 - this is good!

142L - this is bad. 

114L - is good for your example

You can't use: 1837 and 142.03l to calculate avg fuel consumption.

1837 and 142 - 28(!) which is 114. This is the real fuel you've used. You can't use fuel from the first fill-up for that. 

OK. So this could be bug. Probably there is something wrong with my Dropbox functions - with detecting your SDCARD directory.

Sorry for my late response. Family stuff ;)

1. Where exactly? The only one place where you can see ISO format (yyyy-mm-dd) is "date" button. 

2. Need to check it. Probably bug. I changed some forms lately there and maybe I broke something :)

3. Monthly Cost - this is recurring cost. When you add monthly cost for examply today 04-04-2013 - you don't need to add it manually next month. It will be added automatically on 04-05-2013 with the same price and title (and mark as monthly cost). I'm using it for example for my parking fee (fixed price every month). 

4. Yes, I know about it, I tried to fix it but something wasn't working.

Added to my TODO list. 

That's very strange. I need to check my code but I'm getting /sdcard directory in google's way.

Environment.getExternalStorageDirectory();

So Android should detecy your sdcard directory. This could be your ROM problem but I need to check it. Maybe there is a bug and in Dropbox functions I've used fixed directory solution. 

What about standard CSV export - can you find the file /sdcard/ od /sdcard-ext/ - there should be Fuelio directory.

I've checked your values. 

Total mileage: Yes. This is probably because of some roundings in my app. And one mile is missing.

Your fuel consumption is correct. You can check other apps but 73.25mpg (uk) is correct.

I need to check date formats. Date in CSV should be always in ISO format (yyyy-mm-dd).

CSV export is only for backups (at the moment) but I'm thinking about creating special reports.

W ustawieniach mozna nadpisac walute. Musi to dzialac. Testowalem na wielu telefonach.

Aplikacja domyslnie pobiera jezyk na podstawie ustawienia telefonu. W przypadku wybrania jezyka polskiego powinien byc polski.

Moze cos jest nie tak z ROMem? Moze masz jakies aplikacje nadpisujace wartosci "locale"?

Sprawdzilem jeszcze raz. To dziala. Wersja PRO to tylko klucz. Nie powoduje wiekszych zmian w glownej aplikacji.

Na dniach bedzie update do nowej wersji. Pobierz z Google Play Store i moze problem bedzie rozwiazany. Moze taki bug byl we wczesniejszej wersji (ale nikt mi czegos takiego nie zglaszal)

Thanks! This will be fixed :)

To bug. Ogolnie deweloperzy nie przywiozuja juz takiej wagi do urzadzen z VGA. Coraz ciezej tworzyc pod taka rozdzielczosc aplikacje, ale postaram sie poprawic.

W tej chwili wielu deweloperow jako minimalna rozdzielczosc wspiera 480x320 (troszeczke wyzej). Ale postaram sie to poprawic.,