In May 2021, fuel in Spain averaged €1.351 for petrol

Petrol, monthly average€1.351/L
Diesel, monthly average€1.212/L
LPG, monthly average€0.729/L
Weekly bulletins held for May 20215

Monthly averages for Spain across May 2021, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).