A pledge by crude producers to consider extending their output-cut deal failed to excite oil bulls, with prices dropping as more time was seen needed to trim swollen global stockpiles. Futures lost as much as percent 1.3 percent in New York, after falling for a third week this month as rising U.S. supplies offset the effect of output curbs by other producers. Five OPEC nations joined with non-member Oman to voice support for prolonging cuts past June, with Kuwait saying it should be for an additional six months. Russia said it needs more time before making a decision. Oil last week slid to the lowest since November as record U.S. stockpiles and increasing American output as well as drilling activity weighed on prices while the Organization of Petroleum Exporting Countries and other nations try to ease a global glut. A committee of ministers from Kuwait, Algeria and Venezuela and […]