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Our ED mileage picked up a little after the initial break in period and switching to full synthetic.
Currently with ~27k miles it gets 23-25 around town and 27-32 highway - the large variance is speed and acceleration. Anything over 65 and the mileage drops pretty steeply, this is due to the 3.92 gearing and increasing wind resistance.
The only time I've seen 32 was cruising at 60 mph with the A/C off.
Most of the posted speed limits here in Central Texas are 75-80 mph, so we are usually rocking ~26 on the toll roads.
This truck still gets great mileage in my opinion, specially when compared the the hemi we had.
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