How Many Gallons Does a Semi Truck Hold of Fuel?

A semi truck holds anywhere from 100 to 300 gallons of fuel, depending on the size of the truck and its fuel capacity. Semi trucks, also known as semi-trailers, are long haul trucks used for transporting goods across long distances.

They typically have a large fuel tank capacity to enable them to travel long distances without needing to refuel.

Semi trucks are divided into different classes based on their Gross Vehicle Weight Rating (GVWR). Class 8 trucks are the largest and can hold up to 300 gallons of fuel; Class 7 trucks can hold up to 200 gallons; and Class 6 trucks can hold up to 100 gallons. The type of engine in the vehicle also affects how much fuel it can hold; diesel engines hold more than gasoline engines.

The amount of fuel consumption a semi truck gets depends on many factors, including its weight, type of cargo being transported, road conditions, and speed. Generally speaking, semi trucks get around 5-7 miles per gallon. This means that a full tank of 200 gallons could last anywhere from 1,000-1,400 miles before needing refueling.

Fuel Efficiency Tips

  • Ensure that the truck is properly maintained so it operates at peak efficiency.
  • Properly inflate tires for improved fuel efficiency.
  • Utilize cruise control when possible.
  • Reduce drag by making sure cargo is properly loaded.


In conclusion, semi trucks typically have a large fuel capacity ranging from 100-300 gallons depending on the size and type of engine. The amount of fuel consumption depends on various factors such as weight and speed. Fuel efficiency can be improved by following simple tips such as ensuring proper maintenance and tire inflation.

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James Gardner