The only advantage is that they run longer for less cost per mile! ????
But now, for the cost of fuel oil, the people such as us are taking it into the shorts as food costs will also rise for transportantion costs!
Disadvantage,
diesal cost more at the pump. Diesal also has a additive that will in freezing weather make it into jello! Keep the truck, bus running!
Polute the air, cough, gag, choke!