SOFIA (Bulgaria), June 7 (SeeNews) -Â Bulgarian oil refiner Lukoil Neftochim Burgas, part of Russia's Lukoil, said that it turned to a net loss of 254.3 million levs ($147.2 million/130.0 million euro) in 2018 from a net profit of 304.0 million levs the year before, following a rise in expenses.