I’m not sure if I’m allowed to post the link here. The forum belongs to one of two well known UK GA magazines and its found under the fuel price tables section.
You can post it here. However the mods there normally quickly delete links to EuroGA 
Some info on handling in Spain that is useful and prevents rip-offs..
The EGKA pricing is 11-13 years old
I just don’t think pilots bother to enter the data. There are too many of these websites and none of them reached critical mass. Also too few pilots fly very far so the input data will be very thin.
