In May 2017, fuel in Czechia averaged €1.151 for petrol

Petrol, monthly average€1.151/L
Diesel, monthly average€1.117/L
LPG, monthly average€0.529/L
Weekly bulletins held for May 20175

Monthly averages for Czechia across May 2017, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).