(EnergyAsia, September 25, Tuesday) — Fresh from completing a heavy oil upgrader, GS Caltex, South Korea’s second largest refiner, plans to build a similar plant by 2010.The 2.95-trillion-won project follows the completion of a 1.5-trillion-won upgrader at the company’s 650,000 b/d Yeosu refinery earlier this month. The plant converts heavy oil into higher-value oil products…