Oil prices are again under pressure in today's session with Brent Crude trading -1.16% at USD78.49 a barrel and WTI Crude losing -0.79% trading at USD75.22 as concerns about global economic growth were fuelled by Japan, the world's fourth-biggest crude importer, unexpectedly slipping into recession. Weakening global demand and no indications that the OPEC will cut its output weighed on oil prices in recent months.