Oil futures gained for fourth straight session on Thursday as a decline in US crude stockpiles supported prices, while renewed warnings from Tehran over maritime access through the Strait of Hormuz sparked supply worries.
Front-month West Texas Intermediate crude added 0.9% to $91.93 per barrel, while Brent futures were up 0.7% to $96.21/bbl.
Saxo Bank analysts, prices held firm as President Donald Trump indicated that renewed attacks on Iran would be short-lived, alongside reports from US officials that 17 million barrels of oil and oil products exited the Strait of Hormuz on Monday.
Regional friction persisted as Iran expanded its Strait of Hormuz blacklist to 57 non-compliant vessels warning of fines, detention, or confiscation.
Meanwhile, Ebrahim Azizi, chairman of the Iranian parliament's national security committee, reportedly stated on Thursday that "the Strait of Hormuz will not reopen without the will of the Islamic Republic of Iran."
The US Energy Information Administration reported a 4.5 million barrel drop in commercial crude stockpiles to 424.5 million barrels for the week ended August 28.
Saxo Bank noted this represented the first inventory decline since July, supported by exports climbing to their highest level since June and refinery processing reaching a seven-year high.
Concurrently, TPH Energy strategists highlighted that U.S. refiners experienced improved operating indicators in August, driven by stronger diesel cracks and wider crude differentials.