In August 2018, fuel in Slovakia averaged €1.415 for petrol

Petrol, monthly average€1.415/L
Diesel, monthly average€1.260/L
LPG, monthly average€0.618/L
Weekly bulletins held for August 20184

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