Operating Costs • ELDT.LIVE
EIA Raises Its 2027 Diesel Forecast to $4.40 as Inventories Stay Tight
The September 9 federal outlook raised next year’s U.S. retail diesel forecast by 33 cents per gallon and expects distillate inventories to remain unusually low through much of 2027.
The new forecast extends the fuel-cost story into 2027
The U.S. Energy Information Administration released its September Short-Term Energy Outlook on September 9. EIA now forecasts the nationwide retail price of on-highway diesel will average $4.40 per gallon in 2027, up from $4.07 in its August outlook. That is a 33-cent increase, or 8.2 percent, in one monthly forecast revision. EIA also raised its 2026 annual forecast to $5.07 from $4.85 per gallon, a 22-cent or 4.4 percent increase.
The quarterly path still assumes prices ease
EIA's Table 2 forecasts on-highway diesel at an average $5.55 per gallon in the fourth quarter of 2026, followed by $4.93 in the first quarter of 2027, $4.50 in the second quarter, $4.17 in the third quarter, and $4.02 in the fourth quarter. The direction is downward, but every figure is a national quarterly average rather than a promise about a specific day, state, truck stop, or fleet discount.
Low distillate inventories are the central risk
EIA forecasts U.S. distillate fuel oil inventories will fall below 100 million barrels in September and remain below the five-year 2021–2025 low through much of 2027. Distillates include diesel and heating oil. The agency says tight global supply has raised domestic prices and encouraged U.S. exports, while global distillate production is expected to stay below last year's level in the coming months. Thin inventories leave less cushion when refineries, pipelines, ports, weather, or overseas supply are disrupted.
A 33-cent revision becomes material over many miles
At 7 miles per gallon, a truck running 1,000 miles uses about 142.9 gallons. A 33-cent-per-gallon difference adds roughly $47 to that simplified trip calculation. Across 100,000 miles at the same fuel economy, the difference is about $4,714. Those examples isolate the forecast revision; actual cost depends on fuel economy, idle time, location, taxes, discounts, route, reefer consumption, and when fuel is purchased.
Carriers should stress-test rates and surcharges
Owner-operators and fleets can use the outlook as a planning scenario rather than a guaranteed price. Review the diesel index named in each contract, the base price, adjustment frequency, covered miles, payment delay, and treatment of empty miles. Compare projected fuel expense with linehaul revenue and surcharge recovery, and model a higher-price case before committing to a long-term rate. Cash-flow timing matters when fuel is paid today but the surcharge is collected weeks later.
Drivers still need a safe fuel plan
Price volatility makes route-level planning more valuable, but a low posted price is not a saving if the detour, toll, wait, or added mileage costs more. Plan enough fuel for congestion, closures, weather, legal parking, and the next reliable truck stop. Do not run the tank to an unsafe margin, use the shoulder for a routine fuel decision, exceed weight limits, or let price pressure override hours-of-service and fatigue decisions.
The forecast has important limits
EIA completed the modeling and analysis for this outlook on September 3, so the report does not specifically account for market events after that date. Energy forecasts can change as production, inventories, demand, trade, refinery operations, policy, and geopolitical conditions change. The next Short-Term Energy Outlook is scheduled for October 6. Businesses should update budgets as new official data arrive rather than treating $4.40 as a fixed future price.
What ELDT trainees should learn from the update
Fuel economics are not a substitute for safe-driving rules, but they explain many dispatch and business decisions. Trainees can practice converting miles and MPG into gallons, comparing legal fuel stops, and distinguishing a daily retail average from a monthly forecast. Company drivers should also understand that a shipper's fuel surcharge may be paid to the carrier and does not automatically become driver compensation. Ask how the employer handles fuel cards, approved stops, idle policy, and out-of-route miles before accepting a position.
Educational summaries help you prepare, but official FMCSA and state licensing sources remain the authority for current requirements.
Official sources
EIA — September 2026 Short-Term Energy Outlook ↗EIA — Table 2: Energy Prices, September 2026 ↗EIA — Weekly Gasoline and Diesel Fuel Update ↗ELDT.live independently creates and reviews its content. We do not present practice questions as official examination questions and do not guarantee a licensing result.