SINGAPORE/NEW DELHI (Reuters) - Tighter supplies of heavy sour crude oil have combined with increased demand for the high-sulphur refining feedstock from some Asian refiners to hoist Middle East ...

Shares of Frontier Oil Corp. also have soared. Valero attributed its stellar fourth-quarter results to its “superior leverage to sour crude discounts,” which were $10 per barrel cheaper ...

NEW YORK/HOUSTON, May 12 (Reuters) - Sour crude oil supplies for U.S. Gulf Coast oil refiners will be squeezed in coming weeks, market participants said, as global demand rises following this ...

HOUSTON, June 20 (Reuters) - U.S. sweet and sour oil differentials narrowed significantly this month, pricing data showed, as demand for higher sulfur crudes climbed from refineries and exporters ...

Heavy-sour crudes yield more residual fuel oils that ... "The combination of tighter heavy crude and fuel oil supplies, as well as the seasonal rise in power generation demand is expected to ...

NEW YORK/HOUSTON (Reuters) - Sour crude oil supplies for U.S. Gulf Coast oil refiners will be squeezed in coming weeks, market participants said, as global demand rises following this month's OPEC+ ...