Producer Price Index for unleaded regular gasoline.
Latest value
311.942
Index · as of Aug 2026
Year-over-year change
+46.7%
BLS
Month-over-month change
+5.6%
Latest value is 1 month old. Next update expected around Sep 2026.
Calculate your adjustment
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Enter a base value, a current value, and a contract amount to see the adjustment.
Price history
Data & insights
Volatility (12mo)
±12.55%
Std. dev. of month-over-month change
Strongest average month-over-month move historically: March (+10.9% avg).
What this means for your clause
The retail-grade gasoline series, use for a light-vehicle fleet fuel contract, a diesel index is the right choice for heavy trucking instead.
Draft a clause
A starting point citing this series by name and code. Replace the bracketed terms with your contract's actual scope before use.
The [affected portion] of the Contract Price shall be adjusted using US PPI — Unleaded Regular Gasoline (BLS series WPU057104), published by BLS.
Base Period: the index value published for August 2026 (or the month of contract signing, if different) is the Base Value.
Adjustment: at each Adjustment Date, the Current Value is the most recently published three-month average of the index (the Averaging Window). The Escalation Factor equals Current Value divided by Base Value.
Cap: the Escalation Factor applied under this clause shall not exceed 1.10 or fall below 0.90 (a 10% cap and floor) in any single Adjustment Date, regardless of the index's actual movement.
[Replace bracketed terms with your contract's actual affected-portion definition and adjustment-date schedule before use. This is a drafting starting point, not legal advice.]
A diesel fuel surcharge compares a current-period Producer Price Index value for No. 2 diesel fuel to the value at contract signing (the base period), turns that into a ratio, then applies the ratio, often above a threshold, to the freight or transport-affected portion of the contract price. Clauses typically name the exact BLS series code, an averaging window, a publication lag, and a cap limiting the maximum adjustment.
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