Oil workers strike expands to another Texas refinery, Tesoro workers still on picket line

Members of the United Steelworkers union walked out of the Motiva Enterprises LLC refinery in Port Arthur, while workers at three more refineries in Louisiana are poised to do the same.

Union organizers said members of USW Local 423 walked out at midnight on Friday as part of a nationwide campaign to improve safety conditions at aging refineries.

The walkout brings the nationwide total to 12 refineries and petrochemical facilities and now involves close to 6,000 workers.

Six of the striking facilities…