How far can a eighteen wheeler travel on a full tank of diesel?

An eighteen-wheeler, or semi-truck, typically has a fuel tank capacity ranging from 100 to 300 gallons. Depending on factors like the truck's weight, load, and driving conditions, it can achieve fuel efficiency of about 6 to 8 miles per gallon. This means that on a full tank, an eighteen-wheeler can travel approximately 600 to 2,400 miles. However, most commonly, it can cover around 600 to 1,200 miles before needing to refuel.