In April 2019, fuel in Belgium averaged €1.479 for petrol

Petrol, monthly average€1.479/L
Diesel, monthly average€1.486/L
LPG, monthly average€0.549/L
Weekly bulletins held for April 20194

Monthly averages for Belgium across April 2019, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).