Diesel Holds at $3.69 Nationally But PADD 5 Is at $4.42 — The Regional Spread Is the Story This Week.
EIA's Monday print showed national retail diesel at $3.69/gal, off two cents WoW. The headline is benign. Underneath, the PADD 5 (West Coast) spread to PADD 3 (Gulf) widened to $0.73/gal — the biggest in 14 months — as California refinery maintenance and hurricane-season Gulf inventory builds combine. Fuel surcharge passthrough math is breaking down for cross-regional carriers.

EIA published this week's diesel retail print Monday morning: $3.69/gal national, down $0.02 WoW, down $0.13 versus a year ago. The number reads soft. The number is misleading. Underneath the national average, the regional spread between PADD 5 (West Coast, $4.42/gal) and PADD 3 (Gulf Coast, $3.69/gal) widened to $0.73/gal this week — the largest PADD 3-to-PADD 5 spread we've measured since March 2025.
Three things are driving the spread.