Great question. Mazda has a
Great question. Mazda has a successful Mazd6 diesel in other markets. The company races it too. However, something went awry when Mazda tried to prepare it for US sale. I explore the topic in the third link under "Related Stories." Maybe Mazda found out the same thing that every other automaker has. That affordable family cars with diesel engines are not more fuel economical than gasoline cars.