Oil dips as OPEC, Russian output rises ahead of production cut

By Sabina Zawadzki LONDON (Reuters) - Oil prices slipped on Tuesday as crude output rose in virtually every major export region despite plans by OPEC and Russia to cut production, triggering fears that a fuel glut that has dogged markets for over two years might last well into 2017. Traders and analysts said the boost from last week's decision by OPEC to cut crude production had faded and the cartel's promise had been undermined by data showing rising production from within its member countries