The main difference with an "Economy" style tune (whether gas or diesel) generally centers around reducing the shift points a few RPM/MPH. The only complaint we've really had on this type of setup is that the vehicle seems to lug a little at light throttle. Also, this type of setup only works when there is a fair bit of stop & go type driving. For highway driving there isn't any noticeable benefit. For highway driving, the performance program IS the economy program.
Hope this helps.
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Bill Cohron - The Mad Doctor  
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1996!
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