In April 2018, fuel in Slovakia averaged €1.354 for petrol

Petrol, monthly average€1.354/L
Diesel, monthly average€1.223/L
LPG, monthly average€0.565/L
Weekly bulletins held for April 20184

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