Current on-highway diesel prices in California, updated weekly from the EIA. California sits in PADD 5 (West Coast).
As of 2026-04-13, California diesel on-highway prices are $7.559/gal. This is $1.951/gal above the U.S. average. California sits in PADD 5 (West Coast), where carriers face consistent regional diesel basis. Carriers operating regionally or based in California should adjust fuel surcharge models to reflect PADD regional volatility, especially during seasonal refinery maintenance and peak demand cycles. Used-truck dealers in the region should price residuals against current operating cost expectations.
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California has its own dedicated EIA weekly on-highway diesel price series. We update it every Monday for the prior week.
State diesel prices are driven mostly by state fuel taxes, refinery proximity, transportation costs from refinery to terminal, and local environmental regulations (notably California's CARB diesel formulation). PADD region matters more than state line for most of the country.
Most carrier–shipper fuel surcharge contracts reference the EIA national or regional weekly average. To estimate your true cost, multiply the relevant weekly price by your gallons consumed; to bill a surcharge, use the contract formula (commonly: every $0.05/gal above a base price adds $0.01/mile).
The chart on this page shows the last 52 weeks. For longer-range history, the EIA's full weekly archive is at https://www.eia.gov/petroleum/gasdiesel/.
Most carrier–shipper contracts use a fuel surcharge tied to the EIA regional (PADD 5 (West Coast)) price. Common formula: for each $0.05/gallon above a contractual base price (typically $1.50–$2.00), add $0.01 per loaded mile. Review your customer contracts to ensure your base price reflects current PADD 5 (West Coast) conditions.
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