By Claudia Assis
SAN FRANCISCO (MarketWatch) -- Crude-oil futures held to gains after the U.S. Federal Reserve held interest rates unchanged and reiterated its intention to hold rates close to zero until mid-2013. Oil trimmed gains right after the announcement, but recovered some ground after. Crude for December delivery CL1Z +0.40% recently added 69 cents, or 0.8%, to trade at $92.83 a barrel on the New York Mercantile Exchange. It had traded around $93.28 a barrel prior to the Fed announcement.