In December 2018, fuel in Netherlands averaged €1.516 for petrol

Petrol, monthly average€1.516/L
Diesel, monthly average€1.299/L
LPG, monthly average€0.655/L
Weekly bulletins held for December 20183

Monthly averages for Netherlands across December 2018, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).