In May 2013, fuel in Belgium averaged €1.559 for petrol

Petrol, monthly average€1.559/L
Diesel, monthly average€1.365/L
LPG, monthly average€0.604/L
Weekly bulletins held for May 20134

Monthly averages for Belgium across May 2013, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).