In June 2019, fuel in Belgium averaged €1.416 for petrol

Petrol, monthly average€1.416/L
Diesel, monthly average€1.425/L
LPG, monthly average€0.463/L
Weekly bulletins held for June 20194

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