How much diesel fuel does an 18 wheeler consume per mile?

The fuel consumption of an 18-wheeler can vary greatly depending on several factors, including the weight of the load being carried, the speed at which the truck is traveling, and the type of engine and aerodynamics of the truck itself. However, on average, an 18-wheeler can consume between 6 and 8 miles per gallon (mpg) of diesel fuel. This means that for every mile traveled, an 18-wheeler will use approximately 0.125 to 0.167 gallons of diesel fuel.