Oil prices remain near multi-month lows due to continuing oversupply concerns despite a larger drawdown of US inventory.
US crude fell 17 cents at $44.96 a barrel, and Brent crude futures increased 9 cents at $49.68 a barrel, Reuters reported.
US gasoline inventories edged up despite a fall in crude stocks last week, which is more than expected.
Some refineries in the US are operating at record high rates to take advantage of refining margins that are strong.
Commerzbank oil analyst Carsten Fritsch told the news agency: "If they continue to run at these levels then we will see massive builds in distillates and gasoline stocks when the peak demand season is over for gasoline."
Falling margins are prompting refiners to cut runs or head into seasonal maintenance which is expected to fresh build up in US inventories.
How well do you really know your competitors?
Access the most comprehensive Company Profiles on the market, powered by GlobalData. Save hours of research. Gain competitive edge.
Thank you!
Your download email will arrive shortly
Not ready to buy yet? Download a free sample
We are confident about the unique quality of our Company Profiles. However, we want you to make the most beneficial decision for your business, so we offer a free sample that you can download by submitting the below form
By GlobalDataBrent, Forties, Oseberg and Ekofisk crudes, which decide Brent benchmark are expected to produce one million barrels a day during September, adding pressure on oil.