TOKYO -- Saudi Aramco has notified Japan's top oil distributor about a potential change in shipments, stoking concerns about the kingdom's ability to supply crude following attacks on its major refineries a week ago, Nikkei learned Saturday.
State-owned Aramco did not say why it wants to change the oil grade it supplies to JXTG Nippon Oil & Energy from light to heavy and medium, starting in October, JXTG officials said.
