In December 2019, fuel in Luxembourg averaged €1.213 for petrol

Petrol, monthly average€1.213/L
Diesel, monthly average€1.111/L
LPG, monthly average€0.515/L
Weekly bulletins held for December 20193

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