International benchmark Brent crude traded at $76.58 per barrel at 11.38 GMT on Friday while American benchmark West Texas Intermediate (WTI) recorded prices of $72.31 per barrel.
Brent crude cost $78.45 per barrel at 07.09 GMT on Monday while WTI saw prices of $73.67 per barrel.
Iran's OPEC governor Hossein Kazempour Ardebili slammed the tweet of U.S. President Donald Trump in which he ordered OPEC to bring down oil prices, the news agency of Iran's Oil Ministry, Shana, said Thursday.
On Saturday, Trump said in a twitter statement that he spoke to King Salman of Saudi Arabia to encourage Saudi Arabia to ramp up production.
Later on Wednesday, Trump said: "The OPEC Monopoly must remember that gas prices are up & they are doing little to help. If anything, they are driving prices higher as the United States defends many of their members for very little $’s. This must be a two way street. REDUCE PRICING NOW!"
Ardebili accused Trump of imposing sanctions on major oil producers, and subsequently requesting prices to be reduced.
"Pls stop it, otherwise it will go even higher!" Ardebili urged.
Meanwhile, U.S. weekly crude oil production decreased last week for the first time since February, according to the country's Energy Information Administration (EIA) released Thursday.
Crude oil output in the U.S. declined by 45,000 barrels per day (bpd) to stand at around 10.9 million bpd for the week ending June 29, the EIA said.
Loss in production came from the state of Alaska where output decreased by 45,000 bpd, to 447,000 bpd from 402,000 bpd, during that period.
By Gulsen Cagatay