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Best mpg ever 12.8 using super magnetic technology to pull me to the tractor trailer. Without my magical make believe contraption 11.2 on a good day. I assume the trucks naughty girl who likes it rough. Treating truck like 16yo "honda" driver in 4wd in snow it gets 9mpg. I feel it doesnt matter heavy or light foot its a truck. and a 2mpg range id rather not care n have fun. 98 5.9 360 all stock cept 40 series split, fully tuned up.
06 4.7 2wd, Before my 4.56 gear swap I averaged 14-15 around town and 19-20 on the highway....after my swap I'm averaging 13.5 in town and 16 on the highway....
I've done so much stuff I have no idea which mod hurt my mileage the most but it's ok.....The fuel is a small price to pay for the pleasure I get driving it.