While there was no formal push for Organization of the Petroleum Exporting Countries to pump more oil to make up for any potential Russian shortfall, some Gulf members had begun planning for an output increase sometime in the next few months, the Wall Street Journal reported, citing OPEC delegates.

Brent crude futures for August, the most actively traded contract, settled down $2, or 1.7%, at $115.60 a barrel, after rising to $120.80 earlier in the day. The front-month contract for July, which expired on Tuesday, closed up $1.17, or 1%, at $122.84.

U.S. West Texas Intermediate (WTI) crude settled at $114.67 a barrel, down 40 cents or 0.4% from Friday's close. Earlier in the session, it had touched $119.98, its highest since March 9. There was no settlement on Monday's U.S. Memorial Day holiday.

"The suspension of Russia from OPEC plus could be a precursor to Saudi Arabia and the United Arab Emirates utilizing their spare production capacity, because they would feel that they no longer have a production quota agreement that needs to recognize Russia's interest," said Andrew Lipow of Lipow Oil Associates in Houston.

OPEC and allies led by Russia, collectively known as OPEC+, have been unwinding record output cuts in place since the COVID-19 pandemic took hold in 2020. Under a deal reached in July last year, the group was set to increase output targets by 432,000 barrels per day every month until the end of September.
However, Russian crude output in April fell by nearly 9% from the previous month, an internal OPEC+ report showed this month.

Despite the late reversal in direction in the session, both benchmarks ended May higher, marking the sixth straight month of gains. They have risen more than 70% over the period.

The premium of August-loading Brent contracts over a six-month spread hit a nine-week high at close to $15 a barrel, indicating current supply tightness.

Prices were supported most of the session after the European Union agreed to a partial and phased ban on Russian oil, China decided to lift some COVID-19 restrictions and the U.S. summer driving season kicked off.

EU leaders agreed in principle to cut 90% of oil imports from Russia, the bloc's toughest sanction yet on Moscow since the invasion of Ukraine three months ago.

Once fully adopted, sanctions on crude will be phased in over six months and on refined products over eight months. The embargo exempts pipeline oil from Russia as a concession to Hungary.

U.S. crude oil production rose in March by more than 3% to 11.7 million bpd, its the highest since November, according to the government. However, output has been slow to recover from the impact of the coronavirus pandemic and is still far below its record high of 12.3 million bpd in 2019.Oil prices found further support as Shanghai announced an end to its COVID-19 lockdown, and will allow people in China's largest city to leave their homes and drive their cars from Wednesday.

U.S. retail gasoline prices also touched a record national average of $4.622 a gallon, according to AAA gas prices data as Memorial Day weekend marked the official start of the summer driving season.