What causes low gas mileage in a 1998 Mazda b3000?

Low gas mileage in a 1998 Mazda B3000 can be caused by several factors, including a dirty air filter, faulty fuel injectors, or issues with the engine's ignition system. Additionally, under-inflated tires and poor alignment can increase rolling resistance, further reducing fuel efficiency. Regular maintenance, such as oil changes and spark plug replacements, can also impact overall performance and mileage. Lastly, driving habits and excessive idling can contribute to lower gas mileage as well.