The fuel that moves almost everything else just set a new high. US retail diesel averaged about $5.85 a gallon on Friday — nearly 60% above year-ago levels — while California truckers paid close to $7.70, according to market coverage citing AAA figures.

Crude followed the same upward week. Brent settled near $92.68 a barrel and West Texas Intermediate around $91.48, with Brent up roughly 7.6% on the week and US crude nearly 10% higher as Middle East supply routes stayed impaired and traders priced fresh US-Iran exchanges.

The squeeze is less about a single barrel of oil than about refining capacity and middle distillates. Ukraine's campaign against Russian plants has pushed Moscow toward diesel export curbs. In the Gulf, attacks on tankers and energy infrastructure around the Strait of Hormuz have taken more capacity offline. Analysts cited by CNBC estimate that wars have knocked out refineries representing about 5 million barrels a day of capacity, with roughly 8% of global diesel demand disrupted at current run rates.

That matters because diesel is embedded deeper in the real economy than gasoline: freight, rail, agriculture, heating and industry all lean on it. Energy strategists describe the spike as a stealth tax that shows up in grocery shelves and factory invoices long after pump headlines fade. Bond markets are already reading the same signal, with economists linking firmer inflation expectations to elevated distillate costs.

Shipping data underline why relief is slow. Only a handful of commodity vessels crossed Hormuz on Thursday against a recent average closer to 15, even as Washington claims flows have partially recovered. Banks have lifted near-term Brent forecasts — ANZ toward $95, Citi higher for the third quarter — on the assumption that a full Hormuz reopening is taking longer than hoped.

The political bind is obvious ahead of US midterms: a White House that campaigned on cheaper energy now faces record distillate prices, higher jet-fuel costs and growth fears if freight inflation hardens. Until refining outages ease on both the Russia-Ukraine and Iran fronts, diesel — not just the crude marker — remains the sharper gauge of how far the wars are travelling into everyday prices.