In January 2022, fuel in Belgium averaged €1.657 for petrol

Petrol, monthly average€1.657/L
Diesel, monthly average€1.708/L
LPG, monthly average€0.781/L
Weekly bulletins held for January 20225

Monthly averages for Belgium across January 2022, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).