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My mileage has increased quite a bit lately. I've been having some issues w/ the DPF. Dealer told me to start using the Ford Cetane Boost as well. While that has not rectified my black smoke/soot issue, the truck runs like a scalded dog and gets between 19 and 20 mpg at 70-75mph. Mixed city/highway I can't get her below 18. This is un-loaded - no trailer. Clearly I've got an issue w/ the DPF, but she's running good! Not sure if the cetane booster had anything to do with that or not - I started using that when this other issue arose. Just an FYI. The truck has 3.73's, 20" wheels, and 85K miles.
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2008 F-350 4wd Crew Cab Long Bed
6.4 Diesel w/ Torqshift
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