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Old 01-11-2014, 05:43 PM
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Frankenduty00 Frankenduty00 is offline
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Join Date: Dec 2013
Location: Stanwood WA
Posts: 8
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2000 F250SDLB 4x, new Jasper 5.4 2v, AMSoil in every box, AFE intake, Magnaflow muffler.
10-11mpg city on winter blend fuel
14 hwy winter blend fuel
add 1-2 mpg in summer. DEQ up here adds to much crap to fuel.
I have just installed a new x pipe in front of cat that made a huge difference in performance now I am checking mileage.
I will look at Transmission slip and a programmer next.
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