Pump prices eased this week.
Your rest-of-year fuel budget still got worse—and then a backup oil route turned deadly after the forecast was locked.
The forecast moved. The pump did not jump.
On August 11, the U.S. Energy Information Administration raised its 2026 wholesale diesel forecast from $3.10 to $3.37 per gallon, an 8.5% increase from its July outlook using EIA's unrounded figures. It raised wholesale gasoline from $2.75 to $2.91, up 5.9%. The sharper near-term reset sits at the retail pump: EIA now sees third-quarter diesel averaging $5.18 instead of $4.64, and fourth-quarter diesel at $4.86 instead of $4.39. Regular gasoline moved to $4.01 for the third quarter and $3.72 for the fourth. Those are forecast changes, not a claim that fuel jumped by that amount on Tuesday.
In fact, the latest weekly EIA pump data moved the other way. U.S. on-highway diesel averaged $5.257 on August 10, down 9.1 cents from the week before, while regular gasoline averaged $4.006, down 7.3 cents. Both were still far above last year—diesel by $1.503 and gasoline by 88.8 cents—but there was no fresh one-day spike. The useful headline is quieter and more expensive: July's expected relief got pulled back. Any open quote built on that relief now carries more fuel risk through the fall.
A backup route is no longer a clean escape
EIA completed the new forecast on August 6. Its base case assumes severe limits on Strait of Hormuz traffic through August, a slow increase in flows beginning in September, Brent crude near $85 per barrel in the third quarter, and U.S. commercial crude inventories below their five-year low through year-end. The agency also said Saudi Arabia had been rerouting more oil through Bab el-Mandeb, the Red Sea chokepoint that serves as an alternate route when Hormuz is impaired. That route is slower, more expensive, and limited in capacity. EIA explicitly said it did not assume the recent threats around Bab el-Mandeb had resulted in additional production shut-ins.
Then August 11 changed the risk picture. Yemeni authorities told The Associated Press that Houthis fired three ballistic missiles at a commercial vessel in Bab el-Mandeb; the attack killed six people. AP described them as the first known shipping deaths in the latest round of fighting. The strike happened five days after EIA locked its forecast and hit the route carrying some of the oil diverted around Hormuz. That does not prove another fuel increase is coming. OPS inference: the fatal strike widens the downside risk beyond EIA's August 6 base case. Reuters reported through Insurance Journal on July 21 that war-risk premiums had already risen after the blockade threat; no verified post-strike premium or traffic slowdown was available when this was published.
The trap is waiting for the sign at the gas station.
Diesel-heavy fleets have the bigger hole
Take a ten-vehicle fleet running 20,000 miles per vehicle each year at 15 miles per gallon. That is about 13,333 gallons annually. If the August 10 year-over-year per-gallon gaps persisted across that full annual usage, it would cost roughly $20,040 more on diesel or $11,840 more on gasoline over a year. Against July's forecast alone, the new fourth-quarter outlook adds about $1,567 of diesel cost or $1,100 of gasoline cost for that sample fleet if usage is spread evenly. That is an OPS calculation, not an EIA forecast for any individual shop: vehicles × annual miles ÷ actual MPG × price change.
The exposure is not evenly distributed. Diesel-heavy service bodies, rural routes, equipment transport, generator use, and jobs with repeated parts runs take the first hit. West Coast operators are already starting from a higher base: EIA put California diesel at $6.618 on August 10 and the full West Coast at $6.033, compared with $5.044 on the Gulf Coast. A fixed-price call that needs one extra truck roll can lose margin before the owner notices a material line moving. The shops that win are not the ones guessing where crude goes next. They are the ones using their own miles, fuel burn, and delivery charges before sending the quote.
Canada has a second clock running
The available data did not show a fresh spike in national gasoline or Ontario diesel when this was published. At 4:00 a.m. on August 12, CAA's national gasoline tracker showed 163.1 cents per litre—up 0.4 cents from the day before but down 8.6 cents from a week earlier. Ontario's August 10 weekly survey put diesel at 210.5 cents per litre, down 7.9 cents from the prior week. Do not tell a Canadian customer fuel just spiked when the available data says it did not. The risk sits in the lag between a shipping shock, wholesale fuel, carrier formulas, and the next invoice.
Purolator's formula shows how carrier costs can move on a different clock, but these rates predate Tuesday's strike. Its August 10–16 schedule lists 46.4% on both Standard and Expedited less-than-truckload freight, 88.7% on Standard truckload, and 96.2% on Expedited truckload. The surcharge applies to base freight charges plus select accessorials. There is also a known federal date: Finance Canada says the federal rates are scheduled to return September 8—10 cents per litre on gasoline and 4 cents on diesel. That is a known tax-rate change, not a guaranteed pump-price jump. Stress-test quotes spanning that date and refresh the live fuel benchmark before committing.
Protect the quote before you protect the pump receipt
This is a margin-control job, not a prediction contest. Reprice with the data you can prove, keep facts separate from the geopolitical risk, and do not use a scary headline as permission for a vague permanent increase. If your agreement does not allow an adjustment, do not invent one after the customer signs. Review the contract and ask counsel when the language is unclear.
- Rebase every open mobile-service quote. Use the vehicles assigned, expected miles, real fleet MPG, equipment fuel, and current delivered-parts surcharges. Do not bury a generic percentage in overhead and hope it holds.
- Shorten the validity window on new work. Consider seven days as an OPS operating starting point—not a legal or industry standard—then adjust for the job, market, supplier reset cycle, and contract. State the expiry date plainly.
- Separate fleet fuel from freight. Ask each supplier and carrier which surcharge is active, what benchmark drives it, and when it resets. A fuel line and a carrier line are not the same cost.
- Use an index only where the terms allow it. For new work, tie any adjustment to a public benchmark and a stated baseline. For accepted fixed-price work, keep the agreed price unless the contract provides another path.
- Stress-test September 8 on Canadian quotes. Finance Canada says the federal rates are scheduled to return at 10 cents per litre on gasoline and 4 cents on diesel. Refresh the live fuel benchmark before committing; do not assume a one-for-one pump-price increase.
- Recheck the forecast assumption. Watch September traffic through Hormuz and Bab el-Mandeb, then update the fuel baseline when EIA publishes its next outlook. Do not lock a winter price to an August war assumption.
What OPS expects before September
High confidence: price windows stay short through August because EIA's own outlook assumes severe Hormuz constraints for the rest of the month. High confidence: otherwise comparable diesel-heavy fleets carry more margin pressure than gasoline fleets because the diesel forecast reset is larger. Medium confidence: freight and war-risk costs widen if traffic through Bab el-Mandeb slows after the fatal strike; premiums had already risen after the blockade threat, but no verified post-strike premium or traffic slowdown was available when this was published. The key watch item is EIA's assumption that Hormuz flows begin increasing in September. If that recovery slips, open quotes deserve another pass.
- High confidence: Among otherwise comparable mobile fleets, diesel-heavy fleets remain more exposed than gasoline fleets through the fourth quarter.
- High confidence: Canadian freight bills can react on a different clock than local pump prices.
- Medium confidence: A sustained Bab el-Mandeb slowdown would add shipping and insurance pressure beyond EIA's current base case; no post-strike increase had been verified when this was published.
- Watch item: Hormuz traffic, Bab el-Mandeb vessel flow, the September EIA outlook, and Canada's September 8 excise-tax return.
Sources and the duplicate check
The core numbers come from the August Short-Term Energy Outlook, EIA's August-versus-July comparison, and its August 11 pump-price release. The post-cutoff shipping event comes from The Associated Press. OPS previously covered how to protect bids from material shocks in Tariff-proof your next bid. This is different: the new event resets fuel assumptions for mobile crews and adds a second-chokepoint risk after the forecast cutoff.
Reprice the miles before the miles reprice you.
