Oil companies shares mixed at 10 a.m.

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

BP PLC fell $.06 or .1 percent, to $43.40.

Chevron rose $.23 or .2 percent, to $110.10.

ConocoPhillips rose $.15 or .2 percent, to $67.66.

Exxon Mobil Corp. rose $.18 or .2 percent, to $87.15.

Marathon Oil Corp. rose $.22 or .7 percent, to $30.55.