Oil benchmarks fell on Wednesday after an unexpected build in US crude and gasoline inventories despite strong demand, and as traders weighed a possible increase in OPEC crude output to cover any shortfalls in supply from Iran and Venezuela.

Oil benchmarks fell on Wednesday after an unexpected build in US crude and gasoline inventories despite strong demand, and as traders weighed a possible increase in OPEC crude output to cover any shortfalls in supply from Iran and Venezuela.