Reuters | Oil extends gains as Saudi pledges export curbs Reuters TOKYO (Reuters) - Oil prices extended gains on Tuesday after Saudi Arabia pledged to curb exports from next month and OPEC called on several members to boost compliance with production cuts to help rein in global oversupply and tackle flagging prices. Oil rises on promise from Saudis to limit exports next month Oil prices will be stuck below $60 through 2020, Credit Suisse forecasts At Oil Producers' Meeting, Tough Talk Fails to Convince Markets |