Regan Brown
Fuel is the most expensive controllable cost for truck owners and operators. As such, it is crucial to understand how much money is spent on fuel per mile to ensure profitability. The cost of fuel per mile is influenced by the price of fuel, the fuel efficiency of the truck, and the distance travelled. Fuel efficiency, in turn, is impacted by factors such as driving style, terrain, gross weight, season, wind, and vehicle maintenance. By calculating the cost of fuel per mile, truck owners and operators can make informed decisions about fuel purchasing, route planning, and pricing their services competitively.
| Characteristics | Values |
|---|---|
| Average cost of diesel fuel | $4.25 per gallon (as of 2025) |
| Average fuel efficiency of semi-trucks | 6.5 miles per gallon |
| Average fuel efficiency of trucks | 7 miles per gallon |
| Average fuel cost per mile | 36.84 cents (or 37 cents) |
| Average owner-operator's fuel cost per mile (2021) | 48 cents |
| Average fuel cost per mile for dry van owner-operators (2021) | 45 cents |
| Average fuel cost per mile for reefer owner-operators (2021) | 51 cents |
| Average fuel cost per mile for flatbedders (2021) | 52 cents |
| Average annual fuel cost for a commercial truck | $70,000 |
| Average annual maintenance cost for a commercial truck | $15,000 |
| Average annual insurance cost for a commercial truck | $6,500 |
| Average annual coffee expenditure for a commercial truck driver | $600 |
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What You'll Learn
Fuel efficiency: miles per gallon
Fuel efficiency, or miles per gallon, is an important metric for understanding the profitability of trucking businesses. On average, semi-trucks get about 6.5 miles out of every gallon of fuel, but this can vary depending on factors such as driving conditions, driving style, and the age of the truck. For example, a 28-foot box truck can achieve about 8 miles per gallon. To calculate the fuel efficiency of a truck, one can divide the number of miles driven by the number of gallons of fuel used. For example, if a truck travels 1,083 miles on 190 gallons of fuel, its fuel efficiency is 5.7 miles per gallon.
Once the fuel efficiency of a truck is known, it is possible to calculate the price per mile of fuel. This can be done by dividing the price per gallon of fuel by the truck's miles per gallon. For example, if diesel costs $2.10 per gallon and the truck achieves 5.7 miles per gallon, then the cost per mile is 36.84 cents, or 37 cents rounded up. This information can help trucking businesses make informed decisions about the profitability of different loads. For instance, if a load pays $1.89 per mile and fuel costs 37 cents per mile, the profit per mile before considering other costs is $1.52.
There are several ways to improve the fuel efficiency of a truck. One way is to ensure that the engine is properly tuned, which can increase fuel efficiency and maximize power. Fixing a car that has failed an emissions test or is noticeably out of tune can improve its gas mileage by an average of 4%, while addressing a serious maintenance issue such as a faulty oxygen sensor can improve mileage by up to 40%. Additionally, using the correct motor oil for the engine can impact fuel efficiency; using the wrong motor oil can reduce gas mileage by 1-2%, while using the manufacturer's recommended grade of motor oil can improve mileage by 1-2%. Ensuring that tires are properly inflated can also reduce fuel consumption by up to 3%, and it is recommended to check tire pressure at least monthly, preferably weekly. Finally, driving habits and route planning can impact fuel efficiency. Driving at a steady speed on highways instead of local routes or city streets can improve efficiency, and using GPS route planners can help find the most direct route with the least amount of stops and traffic.
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Fuel price: cost per gallon
The price of fuel per gallon is a key factor in determining the overall cost of running a vehicle, especially for trucks. Fuel prices can vary over time, and there are a number of ways to reduce fuel costs.
Firstly, it is important to understand the fuel efficiency of your truck, as this will directly impact the cost per mile. Semi-trucks, on average, achieve around 6.5 miles per gallon of fuel, but this can vary depending on the age of the truck, driving conditions, and terrain. To calculate your truck's fuel efficiency, you can divide the number of miles driven by the number of gallons of fuel used.
The cost per mile can then be calculated by taking the current fuel price per gallon and dividing it by the truck's miles per gallon. For example, if diesel costs $2.10 per gallon and your truck achieves 5.7 miles per gallon, your cost per mile would be approximately 37 cents. This calculation can be performed at any frequency: daily, weekly, or monthly, as fuel prices and mileage may fluctuate.
There are several strategies to optimise fuel efficiency and reduce costs. Ensuring properly inflated tires can reduce fuel consumption by up to 3%, and using the manufacturer's recommended grade of motor oil can improve gas mileage by 1-2%. Driving at a steady speed on highways, when possible, also maximises fuel efficiency. Additionally, addressing serious maintenance issues, such as a faulty oxygen sensor, can significantly improve mileage by up to 40%.
By understanding fuel efficiency, tracking fuel prices, and implementing cost-saving strategies, truck owners and operators can effectively manage their fuel expenses and make more informed decisions about their business operations.
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Cost per mile: fuel price/fuel efficiency
The cost per mile of a truck is calculated by dividing the price of fuel per gallon by the truck's fuel efficiency (miles per gallon). For example, if diesel costs $2.10 per gallon and the truck's fuel efficiency is 5.7 miles per gallon, then the cost per mile is 36.84 cents (rounded up to 37 cents). This calculation can be done for different trips and loads to determine the profitability of each.
There are many factors that influence a truck's fuel efficiency, and thus the cost per mile. These include the age of the truck, the terrain and where you drive (driving in a city is less fuel-efficient than on a highway), and how you drive (idling and frequent stops reduce fuel efficiency). The weight of the truck and the wind can also impact fuel efficiency, and thus the cost per mile.
To improve fuel efficiency, and therefore reduce the cost per mile, there are several measures that can be taken. Ensuring that the truck engine is properly tuned and fixing any serious maintenance issues can improve fuel efficiency by up to 40%. Using the manufacturer's recommended grade of motor oil can improve fuel efficiency by 1-2%, and using motor oil with an Energy Conserving API performance symbol can also help. Keeping tires properly inflated can reduce fuel consumption by up to 3%, and it is recommended to check tire pressure at least monthly, and preferably weekly.
Planning routes carefully to minimize distance, stops, and diversions can also help to maximize fuel efficiency and reduce the cost per mile.
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Maximising fuel efficiency: maintain tyres, avoid idling
Maximising fuel efficiency is a crucial aspect of reducing costs and environmental impact. Here are some essential tips to maximise fuel efficiency by maintaining tyres and avoiding idling:
Maintain Tyres
Tyre maintenance is a simple yet effective way to improve fuel efficiency. Properly inflated tyres can reduce fuel consumption by up to 3%. Under-inflated tyres create more rolling resistance, requiring more fuel to move the vehicle. It is recommended to check tyre pressure at least monthly and inflate them to the manufacturer's recommended levels. This will ensure optimal fuel economy, performance, and safety. Additionally, using the manufacturer's recommended grade of motor oil can improve fuel efficiency by 1-2%.
Avoid Idling
Idling, or keeping the engine running while the vehicle is stationary, wastes fuel and reduces overall efficiency. Encouraging drivers to turn off their engines when stopped for extended periods can significantly reduce unnecessary idling. Implementing automatic engine shut-off systems is an effective solution. Additionally, real-time ignition tracking allows fleet managers to identify instances of excessive idling and optimise vehicle utilisation.
Efficient Driving Techniques
The way a truck is driven significantly impacts fuel efficiency. Smooth driving, including gentle acceleration and gradual braking, helps conserve fuel. Utilising cruise control on highways maintains a steady speed, reducing fuel consumption. For manual transmissions, shifting to a higher gear at lower revs reduces engine strain and fuel consumption. Efficient route planning is also crucial, avoiding peak traffic times and idling zones to minimise unnecessary idling and fuel usage.
Regular Maintenance
Regular maintenance checks are vital for optimal fuel efficiency. A well-tuned engine operates more efficiently, and fixing maintenance issues can improve mileage significantly. Ensuring the cooling system is in good condition maintains the engine at the optimal temperature for peak fuel efficiency. Using the correct type of fuel, as recommended by the manufacturer, is also essential for maintaining the engine and maximising fuel efficiency.
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Reducing fuel costs: walk, bike, or carpool
The fuel efficiency of a truck depends on several factors, including the age of the truck, where it is driven, and how it is driven. Semi-trucks, on average, get about 6.5 miles per gallon of diesel fuel. However, this performance varies. To calculate the fuel cost per mile, you can fill up your truck's fuel tank, record the number of gallons and the odometer reading, and then divide the number of miles driven by the number of gallons used to refill the tank. This will give you the cost per mile, which can be used to calculate the profitability of different loads.
Now, let's discuss ways to reduce fuel costs by walking, biking, or carpooling:
Walking and Biking
Walking and biking is an excellent way to reduce fuel costs and your carbon footprint. According to research, choosing a bike over a car once a day can reduce transportation-related emissions by 67%. Biking is significantly more energy-efficient than driving, as someone riding a bike can go 960 miles on the amount of energy required to drive a car just 20 miles. Additionally, nearly 40% of trips in the US are two miles or less, presenting a great opportunity to opt for biking or walking instead of driving. While this may not be feasible for those in rural areas, urban residents can benefit from reduced fuel costs and improved health by incorporating walking or biking into their commute.
Carpooling
Carpooling is another effective way to reduce fuel costs. By sharing rides with coworkers or using public transportation, you can significantly lower your commuting expenses. Public transportation can save the average household up to $10,000 per year, and it offers the added benefits of providing time to read, rest, or work during your commute. Additionally, buying monthly or annual passes for public transportation is typically more economical than paying by the day, and you may be eligible for special rates or discounts.
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Frequently asked questions
To calculate the fuel cost per mile, you need to first calculate your truck's fuel efficiency, which is the number of miles the truck can travel per gallon of fuel. You can find this in the vehicle's manual or calculate it by dividing the distance travelled by the gallons of fuel used. Once you have this number, take the current price of a gallon of fuel and divide it by your vehicle's miles per gallon. This will give you the cost per mile.
The average semi-truck gets about 6.5 miles out of every gallon of fuel. However, this can vary depending on where and how you drive, as well as the age and maintenance of the truck.
As of April 4th, 2022, the average national diesel fuel cost was $5.144 per gallon. This varied depending on the region, with an average of $4.929 per gallon in the Gulf Coast States and an average of $6.289 per gallon in California.
The average cost of fuel per mile can vary depending on the type of freight and weight being hauled. In 2021, the average owner-operator spent 48 cents per mile on fuel. For dry van loads, this was 45 cents per mile, for reefer loads, it was 51 cents per mile, and for flatbed loads, it was 52 cents per mile.
