National and Regional Trends

For the week ending May 12, the national average for on-highway diesel fell to $3.48 per gallon. This marks the lowest price since December 23, 2024, when it was at the same level. Over five weeks, diesel prices have seen a steady 16-cent decline.

Although most regions experienced falling prices last week, California and the Rocky Mountain regions saw slight increases. California remains the most expensive for diesel, with a 3.2-cent increase bringing its average to $4.76 per gallon. The Rocky Mountain region recorded a minor 0.3-cent bump.

On the other end of the spectrum, the Gulf Coast remains the most affordable region for diesel at $3.14 per gallon, closely followed by the Lower Atlantic region at $3.41 per gallon. The biggest price drops were observed in these regions, at 4 cents and 3.1 cents, respectively.

Here’s a breakdown of regional diesel averages according to the EIA:

• Gulf Coast – $3.14
• Lower Atlantic – $3.41
• Midwest – $3.42
• Rocky Mountain – $3.46
• New England – $3.88
• Central Atlantic – $3.78
• West Coast (less California) – $3.74

Additional data from ProMiles’ diesel averages showed a slight decrease of 2.3 cents, bringing the national average to $3.48 per gallon. ProMiles also reported California as the most expensive diesel location at $4.88 per gallon, while the Gulf Coast retained its position as the cheapest at $3.15 per gallon.

Source : Commercial Carrier Journal

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