In May 2007, fuel in Belgium averaged €1.335 for petrol

Petrol, monthly average€1.335/L
Diesel, monthly average€1.001/L
LPG, monthly average€0.471/L
Weekly bulletins held for May 20074

Monthly averages for Belgium across May 2007, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).