In January 2015, fuel in Slovenia averaged €1.240 for petrol

Petrol, monthly average€1.240/L
Diesel, monthly average€1.157/L
LPG, monthly average€0.640/L
Weekly bulletins held for January 20154

Monthly averages for Slovenia across January 2015, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).