All neigboring countries fill up in Hungary now, until the fun lasts. I spoke to the owner of 4 fuel stations in Austria, all located (in this situation unpleasantly) close to the border, and his daily turnover plummeted from 20000 liters to 3000.

Here is a map of average fuel prices (as pdf-s)
Diesel
[link to ec.europa.eu]
Petrol
[link to ec.europa.eu]

Much moar here:
[link to energy.ec.europa.eu]