In May 2018, fuel in Netherlands averaged €1.689 for petrol

Petrol, monthly average€1.689/L
Diesel, monthly average€1.387/L
LPG, monthly average€0.679/L
Weekly bulletins held for May 20184

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