NEW YORK, Feb. 6 (Xinhua) -- Oil prices settled lower on Tuesday as financial markets remained volatile.

In addition, a stronger U.S. dollar made the dollar-priced commodity less attractive for holders of other currencies.

The dollar index, which measures the greenback against six major peers, increased 0.04 percent to 89.590 at 3:00 p.m. (2000 GMT).

The West Texas Intermediate for March delivery decreased 76 U.S. cents to settle at 63.39 dollars a barrel on the New York Mercantile Exchange, while Brent crude for April delivery lost 76 cents to close at 66.86 dollars a barrel on the London ICE Futures Exchange.