Gasoline Is $0.92 a Gallon Dearer Than a Year Ago, and Refineries Are Running Nearly Flat Out

Two federal data releases this week describe an American fuel market where supply looks comfortable and prices are rising anyway. The U.S. Energy Information Administration put the national average retail price for regular gasoline at $4.049 a gallon for the week ending August 17, up 4.3 cents from the prior week and 92.4 cents from a year earlier. On-highway diesel averaged $5.454, up 19.7 cents on the week and $1.741 on the year.

The supply picture underneath

The EIA's Weekly Petroleum Status Report, covering the week ending August 14, showed commercial crude oil inventories rising by 4.4 million barrels to 428.8 million barrels. Motor gasoline inventories rose 0.7 million barrels. Refineries ran at 97.2% of operable capacity.

• Commercial crude stocks: 428.8 million barrels, up 4.4 million on the week.
• Motor gasoline stocks: up 0.7 million barrels.
• Refinery utilization: 97.2% of operable capacity.
• Regular gasoline, national average: $4.049 per gallon (week ending August 17).
• On-highway diesel, national average: $5.454 per gallon (week ending August 17).

Why builds and higher prices can coexist

It is tempting to read an inventory build as bearish for prices, and often it is. But the weekly stocks number is a snapshot of what is sitting in U.S. tanks, while the pump price reflects the cost of crude — which is set globally — plus refining margin, distribution, and taxes. Crude priced off international supply and geopolitical risk can rise while domestic tanks fill.

The refinery utilization figure is the more telling number here. At 97.2%, U.S. refining is running about as hard as it practically can; the system rarely sustains much above that once maintenance and unplanned outages are accounted for. When utilization is already at the ceiling, refiners cannot respond to strong product demand by making more. The adjustment happens in price instead.

The diesel divergence

Diesel is up $1.741 a gallon year over year against gasoline's 92.4 cents — nearly double the increase in absolute terms. Diesel and gasoline are made from the same barrel but in different proportions, and their demand comes from different places: gasoline from passenger driving, diesel from freight, agriculture, construction and, through the closely related distillate pool, heating. A distillate market that is tighter than the gasoline market shows up as exactly this kind of spread.

For households, the diesel number does not stay in the freight sector. Diesel is an input cost for nearly everything that moves by truck or rail, which means it propagates into goods prices with a lag rather than landing at once.

What to watch

The EIA publishes the Weekly Petroleum Status Report on Wednesdays and the retail price survey on Mondays, so the next readings arrive on a fixed cadence. The autumn transition matters too: refiners typically enter maintenance season after summer driving demand fades, which pulls utilization down from these levels, and the gasoline specification switches from summer to winter blend, which historically eases pump prices independent of crude.