Brent Crude Ticks Up to $88.68 as Iran War Keeps Oil Volatile

Why is oil still moving on Iran war news?

Brent crude, the international benchmark, rose 0.2% on Aug. 28 to $88.68 per barrel. The price remains volatile as the Iran conflict keeps supply routes uncertain. Every swing in crude translates directly to diesel prices and fuel surcharges for small fleets.

Oil has been a wild card for inflation throughout the conflict. The Aug. 28 uptick is modest, but the pattern matters more than the single-day move. Brent has traded in a wide range since the war began, spiking above $92 in June) when Strait of Hormuz doubts peaked, then falling back to $80) two weeks later as some tanker traffic resumed.

For a 10-truck fleet running 100,000 miles per week at 6 mpg, every $10 move in crude translates to roughly $1,500 in weekly fuel cost swings. The volatility makes it harder to lock in rates that cover diesel, especially on spot loads where shippers resist fuel surcharges tied to weekly averages.

What the $88 level means for diesel

Brent at $88.68 keeps diesel elevated but not at the multi-year highs seen in July. U.S. refineries have been running flat out to meet demand, processing 17.4 million barrels per day as of mid-August, the highest rate since 2019. That output has kept diesel from spiking further, but it has not brought prices down to pre-war levels.

The Iran war premium is still baked into crude. Even small daily moves reflect traders pricing in the risk that Hormuz could close again or that Middle East production stays offline longer than expected. OPEC+ quota increases announced in June did little to ease prices because the crude those quotas would release cannot reach buyers while shipping lanes stay disrupted.

How long the volatility lasts

Oil price swings will continue as long as the war keeps supply uncertain. Cushing crude inventories, the U.S. benchmark storage hub, have been draining toward minimum operating levels as demand outpaces supply. Tighter inventories mean less cushion when geopolitical events disrupt flows, which amplifies price moves in both directions.

For small fleets, the takeaway is the same as it has been since the conflict started: fuel surcharges need to be negotiated into every contract load, and spot loads need a wider margin to absorb weekly diesel swings. The $88.68 Brent price is neither a floor nor a ceiling. It is a snapshot in a market that has moved $12 per barrel in either direction within a two-week span this summer.