Reuters | Oil prices slip on doubts potential output cap will erode glut Reuters LONDON Oil futures eased on Tuesday, eroding some of the previous day's gains, over doubts a potential production freeze will have any impact on a supply glut. Big oil exporters Saudi Arabia and Russia have proposed to freeze output at January levels, ... US oil surges 6.2%, closes at $31.48 a barrel Oil price spike is coming – but not for years Oil prices peel back some of Monday's rally as investors cash in on gains |