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Once I get it I will use it for a period of time. I will give it a few thousand miles before I start tracking, probably after I do my first oil change, which will probably be around 2,000 miles more than likely, and I will use it for a while to get a decent baseline, after that I stop using it, since it really just starts reporting back the same numbers after a while.
 

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I really hope a tune helps mpg! I was hoping to get close to 30mph on hway as I drive over an hour one way for work about 35k miles per year.
My supercharged boss 302 with 725rwhp will return 22-25mpg hway
I bet the new 5.0 is more fuel efficient
 

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I really hope a tune helps mpg! I was hoping to get close to 30mph on hway as I drive over an hour one way for work about 35k miles per year.
My supercharged boss 302 with 725rwhp will return 22-25mpg hway
I bet the new 5.0 is more fuel efficient
My 14 FuSE 2.0 average over 3 years was 26.3. 75% of it was highway. I took a few full tank trips, and wasn't getting much better than 30.5.

I'm currently getting about 28 on full highway trips with a feather pedal and cruise
 

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Managed 19.4 on this latest tank, which included about a 3-hour total round-trip drive on some pretty windy roads at a constant 55-60MPH. Still plenty of "spirited" driving on it as well. Once I get my foot out of it a bit, I get the feeling it'll get up to the mid 20's.
 

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I have used it on my previous 2 cars and will continue with the Fusion Sport. I've got 2 fill ups so far and sitting at 19.6 MPG on 87 octane with lots of idling and spirited driving. I'm usually at around 75% city and 25% highway for my normal driving.
My 09 Fusion SE with the 3.0L V6 averaged 21.2 MPG over 94,500 miles with a very heavy right foot so I don't expect the Sport to do any better than that. Hopefully it will surprise me.
 

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Discussion Starter · #14 ·
I've noticed that Fuelly shows me about 1mpg less than the factory trip computer. I reset it at every fill and the Fuelly calculation is always about an mpg lower. Anyone else experience that?
 

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I've noticed that Fuelly shows me about 1mpg less than the factory trip computer. I reset it at every fill and the Fuelly calculation is always about an mpg lower. Anyone else experience that?
I have had some fuel ups that were up to about a 2 mpg difference. The factory computer is off every time. I would say normally by that 1-1.2 mpg, sometimes more though.
 
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