Reuters | Oil slips further below $57 after third-quarter rally Reuters LONDON (Reuters) - Oil dipped further below $57 a barrel on Monday as an increase in U.S. drilling and higher OPEC output put the brakes on a rally in which the market scored its biggest third-quarter gain in 13 years. U.S. energy companies added oil ... Oil prices lower after strong third quarter as September OPEC output rises Oil falls, pausing for breath after strong gains Kurdistan's independence push shadows oil markets |