How many miles can you go on a gallon of diesel?

The fuel efficiency of a diesel vehicle can vary significantly based on the make and model, as well as driving conditions. On average, diesel engines typically achieve between 20 to 30 miles per gallon (MPG), with some efficient models reaching up to 40 MPG or more. Heavy-duty trucks may have lower MPG due to their size and load but can still be more efficient than gasoline-powered counterparts. Always refer to the manufacturer's specifications for the most accurate figures.