National Diesel Price Trends — May 2026 Update
U.S. on-highway diesel averaged $3.78/gal the week of May 5, 2026 — up 4 cents week-over-week and 11 cents above the same week in 2025.
Diesel prices, freight rates, FMCSA rule changes, and carrier news — written for owner-operators and small fleets.
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National and regional diesel price tracking with weekly EIA data context for owner-operators and small fleets.
Spot market rate tracking for dry van, reefer, and flatbed — plus load board commentary and contract vs spot decision frameworks.
Regulatory updates that actually affect your operating authority: HOS, ELD, CSA scoring, drug testing, and MC authority filings.
Carrier bankruptcies, M&A, driver pay trends, and equipment news — the moves that change your competitive landscape.
U.S. on-highway diesel averaged $3.78/gal the week of May 5, 2026 — up 4 cents week-over-week and 11 cents above the same week in 2025.
Dry van linehaul rates held flat week-over-week, reefer ticked up 4 cents on early produce season, flatbed continued the soft slide.
Five fuel-saving tactics ranked by ROI for owner-operators: fuel cards, idle reduction, tire pressure, route planning, and speed governance.
CNG runs $1.50–$2.10 per diesel-gallon-equivalent in 2026 versus $3.78 retail diesel — but capex, fueling network, and resale flip the math.
Run 100% spot when tender rejections are above 8%. Run 60-80% contract when they're under 5%. The math behind the rule.
California diesel runs $1.50/gal above Gulf Coast for four reasons that don't change much: fuel specs, taxes, refinery geography, and pipeline access.