US heating oil futures climbed toward $4.30 a gallon, near a four-month high, as tight distillate supply concerns intensified after the Houthi-linked disruption at Saudi Arabia’s Jazan refinery and amid Russia’s fuel export restrictions. The refinery has been shut since July 27, with its restart delayed from August 15 to August 30. Broader oil markets showed mixed moves as traders assessed conflicting signals from the Middle East: ANZ Research said Persian Gulf producers including Saudi Arabia and the U.A.E. were trying to keep exports moving through the Strait of Hormuz, while other reports pointed to escalating US-Iran tensions, attacks on vessels in the strait and persistent geopolitical risk. Brent was cited at $87.16 a barrel and WTI around $81.20-$81.29, with gains or losses limited by weaker demand forecasts from OPEC and the International Energy Agency and a large rise in US crude inventories.