In May 2006, fuel in Portugal averaged €1.344 for petrol

Petrol, monthly average€1.344/L
Diesel, monthly average€1.076/L
LPG, monthly average€0.593/L
Weekly bulletins held for May 20065

Monthly averages for Portugal across May 2006, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).