Description:

Gas stations are generally open from 7 am to 7 or 8 PM every day; in the summer season, working hours are extended until 10 PM. On-duty Gas Stations in bigger cities and on main international roads are open 24 hours. All pumps sell Eurosuper 95, Super 98, Normal and Eurodiesel. In Dubrovnik there are at least one or two gas stations who are open all night.

more info at INA - gas stations, gas prices http://www.ina.hr/
road information by Croatian National Car Club http://www.hak.hr/