U.S. crude oil rose to a two-year high on Friday, as the shutdown of a major crude pipeline from Canada to the United States tightened North American markets.
Oil prices fell on Tuesday, declining for a second day and sapping more strength from a third-quarter rally.
U.S. crude oil futures fell more than 3 percent on Monday but gasoline prices surged to two-year highs as Tropical Storm Harvey kept hammering the U.S. Gulf Coast.
Oil prices slipped on Tuesday.
Oil prices edged lower on Monday.
World stocks hit record highs on Thursday and the dollar dipped after the U.S. Federal Reserve signaled caution in raising interest rates.
Oil futures rose on Friday to the highest in nearly a month on growing optimism that big producing .