1. Two Wars, One Barrel
The national average price of diesel hit $5.85 a gallon this week, an all-time high, and two separate wars, thousands of miles apart, are why.
Iran is short of gasoline, and has been for years. The country burns roughly 34 to 36 million gallons of gasoline a day and refines only about 32 to 34 million. That gap predates the current crisis, and it showed up in the numbers weeks before the queues started forming in late August.
The war made it worse. Between February and April, Israel and the United States' joint campaign against Iran hit four gas-processing units at South Pars, the offshore field that supplies most of Iran's natural gas, knocking out roughly a third of the field's output. Total war damage to Iran's economy is estimated at $145 billion, with refineries and the fuel network among the direct casualties.
Iran had been covering part of its own shortfall by importing refined gasoline from Russia, shipped south across the Caspian Sea, the inland sea the two countries share. That backup channel is now closing. Russia banned its own gasoline exports in April. Ukraine then spent the year hitting nearly every major Russian refinery with long-range drones, cutting Russian fuel production to a 24-year low. In July, Russia extended its export ban through January 2027. Between the ban and the lost capacity, there's simply less Russian fuel reaching any buyer, Iran included.
On the ground in Iran, that means mile-long gas station lines in Tehran since late August, stations closing, and gasoline selling openly on the black market.
Diesel is a globally traded commodity: when Russian and Iranian fuel both tighten at once, buyers everywhere else are bidding for the same barrels that are left. On top of that, tankers moving fuel through the Gulf now carry war-risk insurance premiums that didn't exist two years ago. Marine war-risk claims have already passed $2 billion this year, more than insurers expected to collect for the entire year on that coverage, and that added insurance cost is baked into what you pay, not just the price of the fuel itself. Don't expect relief from the recent US-Venezuela oil deal either: that oil is earmarked to refill the US Strategic Petroleum Reserve, not the commercial market, so it won't show up at a gas station anytime soon.