My broter in law has an 08 Ford F-450 that they use to tow their race truck with. This truck got about 10.5 empty and 8.5 mpg towing. Last week we put a DPF delete kit on it and a programmer. The truck empty imediatley gets 22 mpg. They have not towed with it yet. They will test it next week.
The new diesels have a DPF on them Diesel Particulate Filter which is a giant exhaust filter, about 10" in diamater in the exhaust system in these trucks. When the filter gets stopped up the computer send it into Regeration mode. It dumps lots of fuel via the injectors and super heats this filter and burns off all the soot. Clean air but very poor mileage and less power.
The new diesels have a DPF on them Diesel Particulate Filter which is a giant exhaust filter, about 10" in diamater in the exhaust system in these trucks. When the filter gets stopped up the computer send it into Regeration mode. It dumps lots of fuel via the injectors and super heats this filter and burns off all the soot. Clean air but very poor mileage and less power.