Chron.com | Oil posts fourth weekly gain as supply concerns persist Chron.com Oil rose for a fourth straight week amid concern that Saudi Arabia and Russia may not pump enough crude to prevent a supply crunch as Iranian cargoes disappear from world markets. Futures were little changed in New York on Friday, ending the week 1.5 ... OPEC's Wildcards Could Push Oil to $100 Back To $100 Oil? Traders Aren't So Sure US oil ends nearly flat, as Brent declines, but both benchmarks tally fourth weekly climb in a row |