In September 2020, fuel in Slovenia averaged €1.003 for petrol

Petrol, monthly average€1.003/L
Diesel, monthly average€1.002/L
LPG, monthly average€0.574/L
Weekly bulletins held for September 20204

Monthly averages for Slovenia across September 2020, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).