It fell as far as $73.60 earlier, its lowest since Dec. 22, 2021.
The Organization of the Petroleum Exporting Countries (OPEC) and its allies including Russia, known as OPEC+, will meet on Dec. 4.
read moreInvestors also focused on Western plans for a price cap on Russian oil.
On Thursday, EU governments were split on the level at which to cap Russian oil prices.
The price cap is due to come into effect on Dec. 5 when an EU ban on Russian crude also takes effect.