* The dollar index (.DXY) which measures the greenback against a basket of six major currencies, hit 96.65, its lowest level in more than three months. * Oil prices held on to most of their previous day’s gains of 7 percent as the dollar weakened and Venezuela appeared to be gaining support from more members of OPEC and other producers for a meeting. * Fed policymaker William Dudley said in an interview published on Wednesday that monetary conditions had tightened since the Fed raised rates and that rate-setters would have to take this into account.