Oil dips for second day on lack of trade talk progress

TOKYO (Reuters) - U.S. oil fell for a second day on Tuesday, amid little sign of progress on U.S.-China trade talks, while Saudi Arabian crude output rose, reinforcing concerns about a glut.U.S. West Texas Intermediate (WTI) crude was down 20 cents, or 0.4%, at $56.66 a barrel by 0039 GMT. The contract dropped 0.7% in the previous session.Brent crude futures were yet to trade after falling 0.5% on Monday.Worries about the impact on oil demand from the fallout of the 16-month U.S.-China trade..