Oil has risen to a 2015 high of $67 a barrel amid expectations the crude supply glut will ease and after weak Chinese factory activity reinforced views stimulus measures would be rolled out.<br /><br /> The collapse of oil prices last year prompted speculation that supply growth in higher-cost crude producers such as the United States would fall back.<br /><br /> Data released last week showed that the pace at which energy companies were taking oil rigs offline in the US slowed in the week to May 1.
