Driving from GA to FL, we will see as much as 22 MPG on our Expedition. Driving back, it will drop to about 19 MPG. Now, this could be in relation to fuel quality between GA and FL, or maybe just differences in trip parameters (overall altitude change, headwinds, traffic, etc.), but it is pretty consistent every time we travel.
As noted, the ECM does tend to relearn driving characteristics (aggressive driving, moderate driving, loaded, unloaded, etc.) and will readjust fuel and timing curves to meet the needs of the vehicle.
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Bill Cohron - The Mad Doctor
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1996!
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