In May 2012, fuel in Belgium averaged €1.630 for petrol

Petrol, monthly average€1.630/L
Diesel, monthly average€1.437/L
LPG, monthly average€0.657/L
Weekly bulletins held for May 20124

Monthly averages for Belgium across May 2012, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).