The price of oil jumped 1.7 percent Friday after Federal Reserve Chairman Ben Bernanke made clear in a speech that the central bank will do more to revive the U.S. economy. U.S benchmark crude rose $1.59 to $96.21 per barrel in morning trading Friday. Brent Crude, which is used to price oil used by many U.S. refiners, rose $1.49 to $114.14. In a speech at an annual Fed conference in Jackson Hole, Wyo., Bernanke said the economic recovery is "far from satisfactory" but he did not give any timetable for action that might reduce borrowing costs and help stimulate growth. If the Fed reduces the cost of borrowing, it could boost demand for the energy needed to fuel growth and make oil and other commodities more attractive investments. Oil prices have wavered between $94 and $97 per barrel over the past two weeks, and Ritterbusch expects them to stay roughly within that range well into September. World oil demand is rising only slightly, and supplies are adequate. But continued worries over tensions between Iran and the West will keep prices from dropping. Expectations of financial stimulus programs from U.S. and European central banks will also keep the market propped up. Hurricane Isaac did not have a major effect on crude prices this. The average retail gasoline price rose less than a penny to $3.83 per gallon Friday according to the Oil Price Information Service, AAA, and Wright Express. In other Nymex energy futures trading, heating oil advanced 2 cents to $3.16 a gallon, while wholesale gasoline added 4 cents to $2.94 a gallon. Natural gas rose 3 cents $2.78 per 1,000 cubic feet. -- SPA