Turkey imports more than 30 percent of its daily consumption from Iran and has so far given no indication that it will comply with a planned EU import embargo on Iranian crude.
One source said that Tupras was planning to meet Saudi Arabian oil authorities this month with a view to switching to alternative crude sources by the summer.
"I think the meeting is to learn the supply capacity ahead of (Saudi) Aramco's other clients," said a second industry source, adding that Iranian threats to shut the Strait of Hormuz had prompted Tupras to approach new suppliers.
Tupras declined to give an immediate comment.
A Saudi source said the Kingdom's oil authorities were getting more orders to replace Iranian crude, but declined to comment on specific requests.
