(EnergyAsia, November 25 2010, Thursday) — In Singapore, Exxon Mobil Corp will be investing in a new export-oriented diesel refinery unit while rival Singapore Refining Company (SRC) will be deferring its decision to build a long-awaited gasoline plant. ExxonMobil said it will build a diesel hydrotreater to boost the production of ultra low-sulphur diesel by…