For Spain, the Ministry of Industry, Energy and Tourism publishes data about fuel prices here: http://geoportalgasolineras.es/#/Inicio
A partial answer for France : the government website http://www.prix-carburants.gouv.fr/ does maintain a data set of fuel prices around France.
(Notice that the data set is licensed under a free and open license so there might be other websites offering a better end user experience.)
Waze (as someone pointed out in a recent question of mine) has communiy supplied fuel prices. Providing a sufficient number of Waze users are in the area, then you have a fair chance of being able to find the petrol station with the lowest price, at least relatively to other nearby petrol stations.
I tried using it near an airport in Italy and it showed be fuel prices that were 4 days out of date, but I didn’t validate them.
Credit:stackoverflow.com‘
5 Mar, 2024
5 Mar, 2024
4 Mar, 2024
4 Mar, 2024
4 Mar, 2024
4 Mar, 2024
4 Mar, 2024