Investing.com - Oil firmed Tuesday as the focus returned to compliance with agreed output cuts.
Brent crude was up 16 cents, or 0.29%, at $55.39 at 08:00 ET. U.S. crude gained 18 cents, or 0.34%, to $52.93.
Iraq is reportedly close to complying with an agreed cut of 210,000 barrels a day in its output.
OPEC and non-OPEC producers have agreed to cut output by some 1.8 million barrels a day in the first half of this year.
American Petroleum Institute stockpile data are due out later in the session.
These will be followed Wednesday by official Energy Information Administration inventory figures.