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What Is The Range Of A Semi Truck? [ Know Horsepower & Mileage ]

What Is The Range Of A Semi Truck? [ Know Horsepower & Mileage ]

Semi-trucks are long-haul giants that come with massive horsepower. There’s no point comparing the mileage of SUVs or cars to these vehicles. They operate primarily on the highways and come with a long lifeline. The nomenclature of semi-trucks or semi-trailer trucks roots from the combination of a tractor with trailers that are capable of hauling freight. Typically, these powerful vehicles run on 18 wheels.

Now, you might be wondering what the range of a semi-truck can be, and how much mileage they deliver. Besides discussing this aspect here, we have also come up with some strategic means that would help you boost your fuel efficiency.

What is the range of a semi truck?

The average range of a semi-truck is about 6.5 miles per gallon. Therefore, considering 300 gallons to be the full capacity of these vehicles, the maximum range of a semi-truck can be 2,100 miles. However, this range largely depends on the model and the driving habits. Other factors, too, impact the range of semi-trucks. These include whether you are traveling uphill or downhill, the amount of load, etc.

If you are climbing up a steep incline in the hill, the fuel efficiency might drop to just 3 mpg. While driving downhill, the fuel efficiency can be quite impressive. Sometimes, semi-trucks can go as much as 23 mpg during downhill drives.

How far can a semi truck go on a full tank?

Most of these vehicles can travel more than 2,000 miles with a full tank of diesel. Typically, semi-trucks come with 300-gallon fuel tanks. On average, they run seven miles per gallon.

Reputed truck brands assist their drivers with viable solutions to make the most of their fuels. This way, your semi-truck would be cruising along the road for long hours. In the process, you can maximize your productivity.

Moreover, the weight of the load comes into the equation while you calculate the mileage. Seasoned drivers already know these vehicles well. Therefore, they remain well-informed on the mileage they should expect from a full tank. Adopting sincere driving habits, they can cover longer distances with a full tank.

How far can a 18 wheeler go on a tank of gas?

Typically, a semi-truck consists of 18 wheels. Depending on its weight, whether it is traveling uphill or downhill, and the terrain, the full-tank mileage significantly varies. Typically, an 18-wheeler can cover around 2,000 miles to 2,100 miles on a single tank of fuel.

How far can a diesel truck go on a full tank of gas?

The manufacturers of semi-trucks design these vehicles in such a way that they can travel thousands of miles between two consecutive fuel-ups. On average, these trucks come with 300-gallon fuel trucks. Taking the average mileage to be 7 miles a gallon, a diesel truck can travel around 2,100 miles on a single tank of gas.

As mentioned, several factors affect the mileage, which can make the fuel last longer, or require more frequent refueling.

What is the range of a Class 8 truck?

The average range of a class 8 truck is similar to that of a semi-truck. Class 8 trucks weigh at least 33K pounds. Tractor-trailers, cement mixers, and dump trucks come under this category.

Typically, these trucks can run between five to eight miles a gallon. Now, the fuel tank capacity differs in class 8 trucks, ranging from 50 to 150 gallons. Most of these trucks come with twin fuel tanks. Considering the maximum capacity of these tanks to be 150 gallons, each truck can carry around 300 gallons of fuel. Taking the average mileage to be 7 miles per gallon, the tank can hold enough fuel to help the truck cover 2,100 miles. Before you purchase one of these vehicles, make sure to know the capacity of the fuel tank to optimize its performance.

Ways to Improve Mileage on Your Semi Truck

Whether you own a semi-truck or a pick-up truck, optimizing the fuel efficiency and mileage continues to be the priority. Here are certain tactics that can help you improve the mileage of these vehicles.

1. Don’t overload the semi-truck

Overloading your semi-truck takes a toll on the diesel mileage. Make sure to adhere to the prescribed limitations when it comes to carrying weight. This way, you can make the most of your truck when it comes to mileage. This would also add to the lifeline of the vehicle.

2. Do not overspeed

Well, it might be tempting for you to speed through the highways and reach your destination at the earliest. Even if you have experienced hands controlling the wheels, overspeeding would lead to more fuel consumption. It would also lead to the heating up of the engine faster. To use your fuel judiciously, make sure to drive at a moderate speed.

3. Watch out for tire pressure

The mileage of your semi-truck largely depends on the tire pressure. Therefore, try not to keep the tires over-inflated or under-inflated. The manufacturers often recommend the ideal tire pressure. So, you simply need to adhere to their recommendations to maintain fuel-economy.

4. Don’t accelerate aggressively

Remember, your driving habits and style go a long way in determining your fuel economy. Try not to accelerate aggressively when you pick up speed. This would significantly help you in conserving the fuel.

5. Avoid idling for long periods

Excessive idling can lead to a faster depletion of your fuel. Therefore, if you need to park the semi-truck for a long time, it’s better to switch the engine off. This way, you can prevent wastage of your diesel and enhance fuel efficiency.

6. Try to drive in higher gears

Lower gears in your semi-truck would take a toll on the fuel. Try to keep the vehicle running in the highest gear. However, this won’t be a practical solution every time you take the road. Nevertheless, there’s nothing wrong with trying to conserve your fuel.


It makes sense to find out the models that deliver better fuel efficiency. For instance, the Freightliner Evolution I seems to be the best semi-truck, with 10.67 mpg as the average. Some of the other vehicles delivering 9 miles per gallon include the International ProStar ES, the Kenworth T680 Advantage, and the Peterbilt 579 Epiq. On the other hand, the Volvo VNL 670 delivers a lower-than-average mileage, at 5.2 mpg. Depending on your requirements, make sure to research and make a calculated decision to optimize your fuel efficiency.