It's pretty simple.

No need to have empty tank. Just make sure to check full tank when it is filled to the top.

To see fuel consumption (fuel economy) and some other values in the Stats you need at least two full fillups. Fuelio is using full tank algorithm to calculate consumption. It's the most accurate algorithm to calculate that. Thanks to that I can calculate how many litres/gallons you have used between fillups.

Yes. Full tank - no need to have empty tank. Just check full when the tank is filled to the top.

Hi,

Sure. Take a look at very basic file in the fuel.io/faq section (CSV).

You can create CSV file to import it.

If you need more complete CSV you can add something to the app and do export. YOu'll see all paramaters. But the file in FAQ is the basic one.

Yes. Consumption is save to CSV only if the cache is generated. Try to go to Stats in the app, move your log, then try to export.

It's not a good way. Be careful with that. Mathematically of course there is a need for full fillup. Full fillup is control point.

Between full fillups you can calculate consumption with high accuracy.

Between two full fillups - you know how many litres you have used. With partial - not possible (of course it's possible if you car can show you amount of fuel left in the tank)

This scenario is possible. You see zero values because you need at least two full fillups to see consumption and few other stats values.

Can you give me one example. What's is missing and where?
As I know many users in UK are using the app. You can easily use miles, gallon (UK) and for consumption see km/L.

After switching values in settings values are recalculated to the units you want.

Maybe this part of app is working but you are thinking about something what is important in the log, stats - just to show it?

But you know you can add it?

Go to Cost Log -> Click on the icon at the top - Cost Category.

You can add categories, change colors etc...

Avg cost per km - as I know it is how it is calculated (only I don't remember if I set it from first full fillup or not).

Hi,

Not a problem.

You can push correction to translation here:

https://crowdin.com/project/fuelio

If any language is missing I can probably also add it :)