Average Diesel Price in Maine

As of early 2026, the average price for on-highway diesel in Maine is around $3.85 per gallon, but you will see a range of $3.60 to $4.10 depending on location and whether you buy at a truck stop or a local station. Prices in northern Maine, especially Aroostook County, tend to run 10 to 20 cents higher due to transport costs, while the Portland area and I-95 corridor are closer to the state average. This guide breaks down current numbers, explains why prices vary, and gives you concrete steps to cut your fuel bill this week.

Current Diesel Price Averages in Maine

The U.S. Energy Information Administration (EIA) reports weekly retail diesel prices by state. For Maine, the latest data (check date: February 2026) shows an average of $3.85 per gallon. Here is a snapshot:

Region	Average Price per Gallon
Statewide average	$3.85
Portland metro	$3.75
Bangor area	$3.80
Northern Maine (Aroostook)	$4.00
Interstate 95 corridor	$3.78

These figures are retail prices at truck stops and fuel stations. Wholesale prices for bulk buyers or fleets with their own tanks are typically 30 to 50 cents lower per gallon.

Why Diesel Prices Vary Across Maine

Several factors push prices up or down within the state:

• Distance from supply terminals: Most diesel comes from the Irving Oil refinery in Saint John, New Brunswick, or from terminals in Portland. Northern Maine is farther from these sources, so transport costs add 10 to 20 cents per gallon.
• Local competition: Areas with multiple truck stops, like the I-95 exits near Waterville, have lower prices because stations compete for volume. Rural areas with one station have less competition.
• Taxes: Maine’s diesel excise tax is 31.2 cents per gallon, plus a 1.8 cent environmental tax. Federal tax adds 24.4 cents. These are fixed, but local option taxes can add a few cents in some municipalities.
• Seasonal demand: Winter heating oil demand can pull diesel prices up, especially in northern regions, because both fuels are similar and compete for refining capacity.

How to Find the Best Diesel Price in Maine Today

Do not rely on the first pump you see. Use these tools and strategies to save money this week:

1. Use fuel price apps: Apps like Trucker Path, Fuelster, and GasBuddy show real-time diesel prices at truck stops and stations. Filter by location and sort by price. Many apps also show amenities like showers and parking.
2. Check state resources: The Maine Department of Agriculture, Conservation and Forestry publishes a weekly fuel price survey. It lists average prices by region, but not station-level details. Still useful for planning.
3. Call ahead: If you are heading to a specific area, call the truck stop’s fuel desk and ask for the current cash price. Prices change daily, and a quick call can save you 5 to 10 cents per gallon.
4. Join loyalty programs: Major truck stop chains like Pilot Flying J, Love’s, and TA/Petro offer loyalty programs that give discounts of 3 to 10 cents per gallon. These are free to join and can add up over a year.
5. Consider bulk purchasing: If you own a small fleet and have storage tanks, buying diesel in bulk from a supplier like Irving or Dead River Company can cut costs by 20 to 40 cents per gallon. You need to meet minimum volume requirements, often 500 gallons or more.

Fuel Management Tips for Owner-Operators

Beyond finding the lowest price, you can reduce your overall fuel cost with these practices:

• Track your fuel economy: Know your truck’s baseline MPG. Most modern Class 8 trucks get 6 to 8 MPG loaded. If you see a drop, check tire pressure, air filters, and fuel injectors.
• Use cruise control on highways: Maintaining a steady speed improves fuel economy by up to 10% compared to constant speed changes.
• Reduce idling: Idling burns 0.8 to 1.5 gallons per hour. Use an APU or bunk heater instead of idling overnight. That saves $3 to $6 per night at current prices.
• Plan your route: Use a GPS designed for trucks to avoid hills and traffic. A route that is 10 miles longer but has fewer stops can save fuel.
• Buy fuel in states with lower taxes: If you run regional routes, check diesel prices in New Hampshire and Massachusetts. New Hampshire’s diesel tax is 22.2 cents, lower than Maine’s, so filling up there can save 5 to 10 cents per gallon.

Diesel Price Trends and Outlook for 2026

Diesel prices in Maine have been relatively stable over the past year. In early 2025, the average was around $3.90, and it dipped to $3.70 in the summer before rising again in winter. For 2026, analysts expect prices to stay in the $3.50 to $4.20 range, depending on global oil markets and refining capacity. The transition to winter blend diesel, which starts in October, typically adds 5 to 10 cents per gallon.

If you are budgeting for the year, plan on $3.80 to $4.00 per gallon as a realistic average. That means a 200-gallon fill-up costs $760 to $800. Over a month with 10 fill-ups, that is $7,600 to $8,000 in fuel costs.

FAQ

Q: How often do diesel prices change in Maine? A: Prices can change daily, especially at major truck stops. They often adjust on Monday or Thursday based on wholesale market changes. Check an app or call ahead for the most current price.

Q: Are diesel prices in Maine higher than the national average? A: Yes, slightly. The national average in early 2026 is about $3.70, so Maine is about 15 cents higher. This is due to higher state taxes and transport costs.

Q: Can I get a discount for paying cash? A: Some independent stations offer a cash discount of 3 to 5 cents per gallon. Truck stop chains typically do not, but they offer loyalty discounts instead.

Q: What is the cheapest day to buy diesel in Maine? A: There is no consistent pattern. Prices are more tied to wholesale market changes than day of week. However, some stations raise prices before weekends to catch travelers, so buying midweek can sometimes be cheaper.

The Bottom Line

Maine diesel prices in early 2026 average $3.85 per gallon, with regional swings from $3.60 to $4.10. To save money, use price apps, join loyalty programs, and consider filling up in neighboring states with lower taxes. Track your fuel economy and cut idling to reduce consumption. With diesel at these levels, a few cents per gallon and a few percentage points in efficiency can save you hundreds of dollars each month. Stay informed, plan your fuel stops, and you will keep more money in your pocket.