A Reuters poll last month showed leading Chinese refiners would raise their crude oil throughput in September to the highest level this year, after PetroChina restarted a major crude unit at its largest Dalian refinery.
China also booked seven VLCCs from West Africa, bringing its total shipments in September to 55 supertankers - the highest number this year.
Asian refiners are turning more towards the spot market than long-term contracts with shipowners to take advantage of depressed freight rates, which have tumbled to record lows.
'VLCC freight rates are once again on a downhill fall, despite the ample fixtures reported, especially in the Middle East,' said George Dermatis, analyst at Athens-based Intermodal Shipbrokers.
Crude oil tanker earnings on the benchmark Middle East to Japan VLCC route have stayed in negative territory for most of the past two months, trading at -US$5,746 a day on Tuesday. In other words, shipowners are paying US$5,746 more a day in bunker fuel and other variable voyage costs than they received from companies using their VLCCs to ship crude oil from the Middle East.