Supply Rebuilds. Operating-Cost Risk Remains.

Executive Summary

U.S. propane inventories increased by 1.8 million barrels to 109.6 million barrels for the week ending September 25, according to the U.S. Energy Information Administration. Inventories were 20% above the five-year average. Exports fell sharply, Gulf Coast inventories increased, and product supplied rose. Diesel prices eased compared with the prior week, but distillate inventories remained 14% below the five-year average and refinery utilization declined to 92.5%, keeping operating-cost risk elevated across the supply chain.

Core conclusion: Supply rebuilds. Operating-cost risk remains.

U.S. Propane Supply Snapshot

Propane supply remained physically available, but stronger wholesale pricing, tighter distillates, freight costs, and physical-market premiums continued to increase delivered-cost exposure for distributors, fleets, and field operations.

Regional Inventory Movement

• East Coast: +0.1 million barrels
• Midwest: −0.4 million barrels
• Gulf Coast: +2.0 million barrels
• Rockies/West: +0.1 million barrels

Inventories rebuilt as exports declined. Last week’s export-driven draw reversed quickly as exports fell and Gulf Coast inventories rebuilt. National inventories were 20% above the five-year average.

BPN Principal Averages — October 1, 2026

BPN Spot Market Commentary

• Mont Belvieu non-LST spot: approximately +0.25 cents versus the prior update.
• Mont Belvieu LST: approximately −0.75 cents.
• Conway deal-making: approximately +0.625 cents.
• Spot prices were higher across all seven markets.

Physical vs. Futures Signal

Same-date comparison — September 30, 2026.

PAM Interpretation: The futures market reflects market expectations for future delivery; the physical market reflects what immediate access to actual barrels was worth on September 30, 2026.

Diesel & Fleet Operations

Diesel eased, but fleet cost pressure remained high. U.S. on-highway diesel prices declined across all regions but remained at very elevated levels. Fuel was still a major operating cost for fleets, fuel distributors, and field operations.

Operational Impact

• Route economics remained under pressure, especially for longer distances and lower-gallon routes.
• Fuel surcharges and carrier rates were still elevated.
• Higher diesel costs increased field-service and delivery expenses across multiple industries.
• Idle time, inefficient routing, and low asset utilization quickly magnified the impact of high fuel prices.

Crude, Refining & Distillates

Crude supply was adequate. Refined-product cushion was tighter. Commercial crude inventories increased, but distillate inventories declined and refinery utilization fell. The refined-product system remained tight, keeping diesel and other distillate products supported.

Lower diesel prices were a positive sign, but tighter distillate inventories and lower refinery utilization showed that refined-product risk had not disappeared. Continued discipline was needed in purchasing, routing, fuel management, and margin recovery.

Historical Market Risk Meter

Propane Supply Risk: LOW. Inventories were 109.6 million barrels and 20% above the five-year average.

Transportation / Operating-Cost Risk: ELEVATED. Tight distillates, higher freight costs, and refined-product supply constraints continued to create exposure.

These ratings reflect PAM’s October 1, 2026 assessment and must not be read as present-day conditions.

Natural Gas — U.S. Note

U.S. working natural-gas storage increased by 64 Bcf to 3,415 Bcf for the week ending September 25, 2026. Inventories were 2.4% above the five-year average. Domestic natural-gas storage remained in a healthy range, but regional constraints or a shift in winter pricing could change the outlook and should continue to be monitored.

Management Questions

• Where are higher fuel and freight costs appearing in delivered cost?
• Which routes, customers, or branches become least economical first?
• Are fuel and freight increases being recovered or absorbed into margin?
• How much supplier, carrier, or terminal flexibility exists?
• Are trucks, labor, and assets being utilized efficiently enough to offset external cost increases?

What to Watch Next

• Distillate inventories and refinery utilization
• Diesel price direction and regional trends
• Propane exports and Gulf Coast inventory levels
• Mont Belvieu and Conway spot activity
• Natural gas storage and winter pricing signals
• Freight and fuel surcharge trends

This watch list is preserved as historical forward-looking context from October 1, 2026.

PAM Interpretation

The data showed improving propane supply, but a tight refined-product system and elevated transportation costs kept operating risk high. Leaders should focus on cost discipline, route economics, asset utilization, and supplier flexibility as the operation moved into the winter season.

Supporting conclusion: Supply improved. Cost discipline still matters.

ASK PAM

Put This Market Watch to Work

Management question: “Propane inventories rebuilt and diesel eased. What should management measure before assuming the cost problem has improved?”

1. What is happening? As reported October 1, 2026, propane inventories rebuilt and diesel prices eased, but distillate inventories tightened, refinery utilization fell, and transportation and delivered-cost exposure remained elevated.
2. What should we measure? Measure delivered cost by route, customer, and branch; diesel and fuel-surcharge recovery; carrier and terminal cost; miles, idle time, gallons and stops per route; asset utilization; and margin recovery.
3. What may be causing it? Refined-product tightness, lower refinery utilization, freight and fuel-surcharge pressure, physical-market premiums, inefficient routing, long terminal distances, and weak cost recovery can keep operating cost high even as propane supply improves.
4. What can management control? Management can control route design, supplier and terminal flexibility, carrier strategy, asset utilization, purchasing discipline, pricing and surcharge recovery, and the work accepted at current margins.
5. What decision may need to be made? Leaders may need to reprice or reroute work, change carrier or terminal options, adjust service commitments, or redirect capacity away from routes and customers whose delivered cost cannot be supported.
6. What practical step comes next? Review one recent week of route-level delivered cost and margin, identify where diesel and freight still appear first, and compare those results with the prior week before concluding the cost problem has improved.

This answer uses the report’s dated October 1, 2026 market evidence and evergreen PAM operating principles. It does not represent current market conditions.