Getting started!
 

New here, just added my car and want to get started! I filled it completely and reset the trip counter - just wondernig how do I go about adding the first fill? Should I wait until it's empty before adding the details here?

Do as many or as few miles as you wish, the calculations are the same. When you fill up, make sure to put the same amount in (full tank) then note down the litres you put in, and the miles on your trip odometer, put them into fuelly and hey presto, you get your readings!