The claim: American petrol prices this Labor Day weekend were the highest ever.

Our finding: True in cash terms, and false once you account for inflation. Both halves of that matter, and the versions of the claim circulating rarely say which one they mean.

What is true

The average price of regular petrol heading into the holiday was $4.14 a gallon, according to AAA. The previous Labor Day high was $3.82 in 2012. GasBuddy recorded a comparable figure against a previous Labor Day record of $3.83. Prices were up roughly 96 cents on a year earlier.

So as a statement about the number printed on the sign at the filling station, on a Labor Day weekend, the claim holds.

What is missing

A dollar in 2008 bought considerably more than a dollar in 2026. Comparing prices across years without adjusting for that measures the currency as much as the fuel.

Adjusted into 2026 dollars, the record for Labor Day petrol prices was set in 2008, at the equivalent of $5.63 a gallon. On the same inflation-adjusted basis, Labor Day prices were also higher in 2005, after Hurricane Katrina disrupted Gulf Coast refining, and in 2022. Today’s $4.14 sits below all three.

Two further comparisons are worth having. The all-time national average record — not restricted to Labor Day — was around $5.02 to $5.06 a gallon in June 2022, in cash terms, which is well above today. And diesel genuinely did reach a record on Friday at $5.85 a gallon in cash terms, which is a separate claim from the one about petrol and is often merged with it.

Which measure is the right one?

There is a real argument here, and it is not a case of one side being honest and the other spinning.

The case for the inflation-adjusted figure is that it is the only way to compare the burden of a price across time. If wages and everything else have roughly doubled since 2008, a nominally similar petrol price represents a much smaller share of income. Economists use real terms for this reason, and a nominal record announced during any period of sustained inflation is close to inevitable.

The case for the cash figure is that it is what people actually experience. Nobody deflates the pump price by a consumer price index before deciding whether to take a trip. Petrol prices are unusually visible — displayed in large numerals on roadsides — and function as a rough gauge of the cost of living. The psychological weight of crossing four dollars is real even if the economic weight is smaller than in 2008.

A further complication: whether prices feel high depends on the reference point, not the record. This year began at $2.98 before the war started in February. A rise of more than a dollar within seven months is a large and rapid change regardless of where it sits historically, and that rate of change may explain public reaction better than either record.

How to read this kind of claim

Three questions settle most price-record claims. Is it adjusted for inflation, and if the source does not say, assume not. Which exact series is being described — regular petrol, diesel, a single holiday weekend, or an all-time figure? And who benefits from the framing chosen?

On that last question, note that both political sides have a use for the same number here, in opposite directions: as evidence of an administration’s failure, or as evidence that things are not as bad as they look. The number does not change. The adjective in front of it does.

Our fuller report on the price rise and its causes is here.

Sources

• AAA motor club average fuel prices, September 2026
• GasBuddy commentary and Labor Day price series
• CNN Business, Labor Day gas has never been this expensive, 4 September 2026, including inflation-adjusted comparisons
• Associated Press, Fuel prices at record Labor Day high in US, 7 September 2026
• Newsweek, Labor Day 2026 gas prices compared to years past, with historical averages
• US Energy Information Administration historical retail gasoline price data