Average Cost of Diesel Today

As of early 2026, the average cost of diesel in the United States hovers around $3.80 to $4.20 per gallon for on-highway use, according to the Energy Information Administration (EIA). That’s a slight drop from the 2025 average, but prices vary widely by region, with the West Coast often $0.50 to $0.80 higher and the Gulf Coast typically the cheapest. For a truck averaging 6.5 miles per gallon, that translates to roughly $0.58 to $0.65 per mile in fuel costs alone. This guide breaks down what’s driving those numbers and how you can keep more money in your pocket.

Current National Average Diesel Price (2026)

The EIA’s weekly diesel price report is the industry standard. As of February 2026, the national average for on-highway diesel is approximately $3.95 per gallon. Here’s a snapshot of regional averages (as of the same date):

Region	Average Price per Gallon
East Coast	$3.90
Midwest	$3.85
Gulf Coast	$3.70
Rocky Mountain	$3.95
West Coast	$4.45
California	$4.70

These are ballpark figures; your actual price at the pump depends on taxes, local supply, and the type of fuel (e.g., #2 diesel vs. biodiesel blends). Check the EIA’s website for the latest weekly update.

What Drives Diesel Prices?

Several factors push diesel prices up or down, and knowing them helps you predict trends:

• Crude oil costs: Diesel is refined from crude, so global oil prices are the biggest driver. When OPEC+ cuts production or geopolitical tensions spike, diesel follows.
• Refining capacity: Diesel demand is high globally (for trucking, farming, and heating), and U.S. refineries have limited capacity. Any outage or maintenance can tighten supply and raise prices.
• Taxes: Federal excise tax is $0.244 per gallon, and state taxes add anywhere from $0.15 (Alaska) to $0.74 (California) per gallon. That’s a $0.40 to $1.00 swing just in taxes.
• Seasonality: Diesel prices often rise in winter (heating oil competition) and during summer (driving season). Expect peaks in late fall and early spring.
• Regional logistics: The West Coast has fewer pipelines and stricter fuel blends, so prices run higher. The Gulf Coast, near refineries, is usually the cheapest.

How to Find the Best Diesel Prices Today

You don’t have to pay the average. Here are concrete steps to cut your fuel costs this week:

1. Use fuel apps: Apps like Trucker Path, Fuelio, and GasBuddy (with a truck filter) show real-time prices at thousands of truck stops. Sort by price per gallon and filter by amenities you need (parking, showers, scales).
2. Join loyalty programs: Major chains like Pilot Flying J, Love’s, and TA/Petro offer loyalty cards that give you instant discounts, often $0.05 to $0.15 per gallon, plus points for future savings. Sign up for free at the counter or online.
3. Check cash vs. credit prices: Many truck stops offer a lower price for cash or EFS checks. The difference can be $0.05 to $0.10 per gallon. If you have the cash flow, it adds up: 100 gallons saved at $0.10 is $10 per fill-up.
4. Plan your route around fuel stops: Use a route planner (like Trucker Path or Hammer) that factors in fuel prices. A 50-mile detour to save $0.20 per gallon might not be worth it if you burn 8 gallons extra, but a 10-mile detour often is.
5. Monitor weekly trends: Diesel prices typically dip on Tuesdays and Wednesdays as stations adjust to the previous week’s wholesale changes. Fill up midweek if possible.

Fuel Surcharge and Cost Per Mile

If you’re an owner-operator or leased to a carrier, you need to know your fuel cost per mile. Here’s the math:

• Average fuel economy: 6.0 to 7.0 mpg for a typical Class 8 truck.
• Fuel cost per mile: Divide the price per gallon by your mpg. At $3.95/gallon and 6.5 mpg, that’s $0.61 per mile.
• Fuel surcharge: Most carriers add a fuel surcharge to your rate based on a baseline (e.g., $1.50 per gallon). If diesel goes above that, you get a per-mile surcharge. Know your contract’s formula; it’s usually $0.01 per mile for every $0.05 increase above the baseline.

Track your actual mpg with your ELD or telematics. If you’re getting less than 6 mpg, check tire pressure, air filters, and your speed (65 mph vs. 75 mph can save 0.5 to 1.0 mpg).

Fuel Management Tips for Owner-Operators

Fuel is your biggest variable cost, often 30% to 40% of operating expenses. Here’s how to manage it like a pro:

• Use a fuel card: Fuel cards (like Comdata, EFS, or T-Chek) offer discounts at partner stations, typically $0.05 to $0.15 per gallon off the cash price. They also give you detailed reports for tax and IFTA purposes.
• Buy in bulk when possible: If you have storage tanks at your base, buying 1,000+ gallons at wholesale prices can save $0.20 to $0.40 per gallon. Check local regulations and insurance requirements.
• Avoid idling: Idling burns 0.8 to 1.0 gallons per hour. An APU or bunk heater costs $8,000 to $12,000 but pays for itself in fuel savings within 2 to 3 years if you idle 8 hours a day.
• Plan for state tax differences: Some states (like Oregon and New Mexico) have fuel tax agreements that let you pay at the pump and avoid double taxation. Use your IFTA records to file accurately and avoid penalties.

FAQ

Q: Why is diesel more expensive than gasoline? A: Diesel has a higher federal excise tax ($0.244 vs. $0.184 for gasoline), and global demand for diesel (for trucking, farming, and heating) is strong. Also, U.S. refineries produce less diesel per barrel of crude than gasoline, so supply is tighter.

Q: How often do diesel prices change? A: The EIA updates its national average every Monday. At the pump, prices can change daily, especially in competitive markets. Wholesale prices change every day based on the NYMEX futures market.

Q: Can I deduct fuel costs on my taxes? A: Yes, fuel is a deductible business expense for owner-operators. You can either deduct actual fuel costs (keep all receipts) or use the standard mileage rate (which includes fuel, but that’s for smaller vehicles). For semi-trucks, actual costs are usually more beneficial. Track every gallon for IFTA and IRS purposes.

Q: What’s the best time of year to buy diesel? A: Historically, diesel prices dip in January and February after the winter heating season, and again in late summer before the fall harvest. Avoid buying during peak winter cold snaps or just before major holidays when demand spikes.

The bottom line

Diesel prices in 2026 are averaging around $3.95 per gallon nationally, but you can beat that with the right tools and habits. Use fuel apps, join loyalty programs, and track your mpg to cut your cost per mile. For owner-operators, every $0.10 per gallon saved on 200 gallons a week is $20, or over $1,000 a year. Stay informed with the EIA’s weekly report, and plan your fuel stops strategically. That’s how you keep your profit margin healthy in a volatile market.