CNBC | US oil erases gains, closes at $32.78 a barrel CNBC Oil prices gave up gains, but still recorded weekly gains, as supply disruptions in Iraq and Nigeria provided supported. Pipeline outages in Iraq and Nigeria have removed more than 800,000 barrels of crude oil per day from the market for at least the ... Oil prices hit four-week highs Oil slides on profit-taking; US crude still on to big week Oil climbs, set for second straight weekly gain |