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Ron
Recently updated my SCT model 1805, S/N 1249302 with the new Mileage tune.
Uploaded the tune to my 2004 F-350 King Ranch, 6.0 liter.
Airaid cool air intake,
5" turbo back magnaflow exhaust
After 2 tanks of diesel the mileage appears to be decreasing from what I saw on the Tow Haul tune. Most of my driving has been short trips to work and back (about 16 miles round trip) with the exception of a once a week round trip into Omaha (about 70 miles round trip).
I have not changed my driving habits and expected an improvement in MPG. This not appear to be the case so far.
Maybe I have just not put enough miles on the new tune???
Has anyone else (6.0 liter diesel) experienced anything like this?

Your not the only one that did not like the MXS tune.

Your best way to get the MXS to work is on open road constant throttle speed driving.
No towing, at HWY speeds.

Mixed driving, I would recommend the perf tune for best mileage.

Ron

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