Fuel price shocks rarely land the same way twice, and this year's run-up has been anything but uniform across the country. A fleet manager running routes out of Houston is looking at a very different cost curve than one dispatching trucks out of Los Angeles or Newark. If your budgeting still treats "the national average" as a meaningful planning number, the regional data below should change that.
Why PADD Boundaries Matter More Than State Lines
The Petroleum Administration for Defense Districts, or PADDs, were drawn up decades ago to track fuel supply during wartime, but they still shape how fuel actually moves through the country. PADD 1 covers the East Coast, PADD 2 the Midwest, PADD 3 the Gulf Coast, PADD 4 the Rocky Mountain states, and PADD 5 the West Coast including California, Oregon, Washington, Alaska and Hawaii. Refining capacity, pipeline connections, and import dependence differ enormously between these zones, and that's why identical crude oil moves can produce wildly different pump prices depending on where your trucks fill up.
Gulf Coast refineries sit close to crude supply and export terminals, which tends to keep local prices more competitive. The West Coast, by contrast, has limited pipeline connections to the rest of the country, stricter fuel specifications, and heavier reliance on seaborne imports, so it usually runs at a premium and reacts more sharply when oil prices move. For fleet operators, understanding which PADD your terminals and routes fall into is a better starting point for cost forecasting than any single national number.
The National Picture: Diesel and Gasoline Since January
Nationally, diesel averaged $3.52 a gallon in January before climbing to a peak of $5.59, a jump of 59%. It has since eased to $5.27, still well above where the year started. Gasoline followed a similar arc: from a January average of $2.70 to a peak of $4.35, up 61%, before settling at $4.11 most recently.
Those swings matter for anyone running a fleet on thin margins. A 59% increase in diesel isn't a rounding error on a fuel line item, it's the difference between a route that pencils out and one that doesn't. And the pullback from peak levels, while welcome, still leaves diesel and gasoline sitting far above where budgets were set at the start of the year. Anyone who locked in rates or built annual plans around January pricing has likely already blown through those assumptions.
Gulf Coast (PADD 3): Refining Hub, Relatively Insulated
PADD 3 has behaved the way you'd expect a refining-heavy region to behave: still volatile, but generally cheaper than the national picture. Diesel there started the year at $3.23, peaked at $5.20 (a 61% rise), and has since come down to $4.42. Gasoline moved from $2.41 in January to a peak of $3.98, up 65%, before settling at $3.48.
The Gulf Coast's proximity to refining capacity and export infrastructure gives it a structural edge over other regions, and that shows up clearly in the latest numbers. Diesel there sits roughly 85 cents below the national latest price, and gasoline runs more than 60 cents cheaper than the national figure. For fleets with flexibility in where they fuel, or with terminals concentrated in Texas, Louisiana, or the broader Gulf region, that gap adds up fast across a large fleet over a full year.
West Coast (PADD 5): Structurally Expensive
If PADD 3 is the relative bargain, PADD 5 is the opposite end of the spectrum. Diesel in the West Coast region started January at $4.18, a full dollar above the national average at the time, then spiked to $6.72 (up 61%) before easing to $5.81. Gasoline climbed from $3.39 to a peak of $5.25, a 55% increase, and now sits at $4.81.
These aren't small gaps. West Coast diesel is running more than 50 cents above the national latest figure, and gasoline is roughly 70 cents higher. Limited refining capacity, stricter environmental fuel blends, and heavier reliance on imports all play a role, and none of those structural factors are going away soon. Fleets operating in California, Oregon, Washington, or servicing routes into Alaska and Hawaii need to plan for a persistent regional premium, not treat it as a temporary anomaly.
California and Texas: Two Ends of the Spectrum
Zooming into individual states sharpens the picture even further. Texas gasoline tracked close to the Gulf Coast trend: a January average of $2.37, a peak of $3.96 (up 67%), and a latest price of $3.69. That's among the more affordable state-level pricing in the country right now, and it reflects Texas's position at the center of US refining and pipeline infrastructure.
California sits at the opposite extreme. Diesel there started at $4.66 in January, the highest baseline of any region discussed here, and peaked at $7.42 (up 59%) before settling at $6.87. Gasoline moved from $4.01 to a peak of $5.97 (up 49%), now sitting at $5.65. A fleet running the same number of miles in California versus Texas is paying dramatically different fuel costs per gallon, and that gap alone can swing a regional operation's profitability more than fuel efficiency upgrades or route optimization ever could.
What's Driving the Volatility Right Now
Recent weeks have shown just how quickly the picture can shift. Oil prices pulled back as the pause in hostilities between the US and Iran held, easing some of the geopolitical premium that had been built into crude. But that pause is fragile, and markets know it. A stronger dollar, supported by elevated Treasury yields and continuing tension in the Middle East, has added another layer of pressure on oil pricing dynamics, since a stronger dollar tends to weigh on oil priced in dollar terms even as regional supply risk pushes the other direction.
Jet fuel has been a particularly sharp example of how fast these swings can hit real-world budgets. A July spike in jet fuel pricing forced US airlines to walk back earnings guidance for the year, a reminder that fuel cost volatility isn't just a trucking problem. Diesel and gasoline fleets face the same basic exposure: input costs that can move by double-digit percentages within a matter of weeks, largely outside anyone's operational control. Some analysts have flagged that a return toward $100 oil could pressure other parts of the economy too, including capital spending plans in sectors far removed from fuel. For fleet operators, the takeaway isn't which sector gets hit next, it's that oil-linked volatility keeps finding new ways to disrupt budgets that were built on calmer assumptions.
Practical Steps for Fleet Operators
Given this backdrop, a few practical adjustments are worth putting in place regardless of which PADD your fleet operates in.
First, budget by region, not by national average. If your routes span multiple PADDs, blend your cost assumptions accordingly rather than applying one flat number across every terminal.
Second, revisit fuel surcharge structures with customers or shippers. If your contracts were priced off January assumptions, they're likely out of date given the moves described above.
Third, build in a wider cushion for West Coast and California operations specifically. The data shows those regions run consistently higher and react more sharply to global oil swings, so a thinner margin there carries more risk than the same margin would in the Gulf Coast or Texas.
Locking In Certainty
This is exactly the kind of environment fixed-price fuel supply agreements were built for. FuelAnchor lets fleet operators lock in a maximum price per gallon, so if diesel or gasoline spikes again the way it did earlier this year, your fuel line item doesn't spike with it. It's not a trading position or a payout mechanism, it's a straightforward supply agreement that puts a ceiling on what you'll pay, regardless of what oil does next.
A Concrete Next Step
Pull your fuel spend data from the last six months and sort it by PADD or by state instead of by month. If you're running lanes through California or the broader West Coast without a wider cost cushion built in, that's the first place to fix before the next price swing hits.