London - New York oil prices approached six-year lows on Tuesday on worries over growing US stockpiles and after Opec warned of a stubborn global supply glut, analysts said.
US benchmark West Texas Intermediate (WTI) for April delivery slid to $42.63 a barrel - touching the lowest level since March 11, 2009. It later stood at $42.70, down $1.18 from Monday's close.
Nearing midday in London, European benchmark Brent North Sea crude for May delivery fell $1.14 to $52.80 a barrel.