ISTANBUL (Turkey), March 25 (SeeNews) – Turkish integrated energy company Turcas Petrol [BIST:TRCAS] said its unit Turcas Rafineri Yatirimlari is talks with Rafineri Holding, a unit of Azeri state-owned oil and gas firm Socar, on the sale of its 18.5% stake in the Star oil refinery project in western Turkey.