In May 2019, fuel in Luxembourg averaged €1.287 for petrol

Petrol, monthly average€1.287/L
Diesel, monthly average€1.130/L
LPG, monthly average€0.490/L
Weekly bulletins held for May 20194

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