Shares of some top oil companies are mixed at 10 a.m.:

BP PLC fell $.19 or .4 percent, to $48.36.

Chevron rose $.53 or .4 percent, to $128.37.

ConocoPhillips rose $.19 or .2 percent, to $80.99.

Exxon Mobil Corp. rose $.93 or .9 percent, to $99.68.

Marathon Oil Corp. rose $.35 or .9 percent, to $40.72.