:rawr:The Green Monster:rawr:: 2001 F250 Powerstroke, 2WD, ZF6 transmission. Bully Dog GT Tuner set in tow mode. MotorSilk boric oxide added to engine, transmission and diff. Showing 30mpg on the freeway running home brew biodiesel. NTZ 1/2 Micron bypass oil filter. Dieselsite coolant filter. 4" open turbo back exhaust. Ford AIS intake. Donaldson ELF7405 oil filter. Caterpillar ELC next on the list.