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All,

I am a little bummed that my V6 Fusion only gets around 22.8 overall. I have only 3000 miles on it, perhaps it gets better as it breaks in or is this it?

My driving is about half city and half highway...
 

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When I do half and half, I'm around 26-27. Straight up expressway, I break 31. Straight city, I'm around 21-22. I got 10,000 miles and a tuner from Bob Jusnes.
 

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Iunno, man. Is it new? These things take a while to break in, i guess. Mine was nasty when I first got it, 100% expressway on cruise @ 75mph I was only at 25 and 26. Now, I have 5 on top of that.
 

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Straight hwy at 75-80 mph I only average around 30mpg, not much better than the V6's I am afraid. The I4 manual revs pretty high at those speeds. To work and back which is stop and go, plus some hwy, plus some 45mph stretches, I average around 26-27. Just stop and go with little time in 5th gear...much less.
 

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Metallicat, I don't know where Northville is... I lived in SE Michigan for 20 years. The expressways around here in Florida and flat as a pancake and smooth. I know most of the roads in Michigan are tore up from the big trucks.

I believe that the road surface could play a part in that. I know when I am coasting [off the gas] my car will go forever without slowing drastically. On a rougher surface road, it will slow quicker. I figure that's more rolling resistance, and that could factor into the mileage?

Are you using cruise control? I am an avid fan of that, I I think that it yields better mileage, since I know some poeple "pulsate" the gas pedal with their foot, on and off, on and off. You may not feel it, but the car will use more gas that way. I use cruise anytime I can.

From the best I remember, I can get the car to shift into 6th gear [automatic/V6] around 42mph. There, it's at about 1,200rpm. 50mph is exactly 1,500rpm.

I believe that 70mph is 2,400rpm, maybe? I'll check on the way home from work for ya and post back. What kind of rpm's are you turning in the 4-banger?

Also, I noticed a pretty decent increase with the Jusnes tune, when I keep my foot out of it, at least. You?
 

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Hi Swoop. Cruising at 50-55mph, I can knock down 36 mpg easily, but at 75 mph I am turning 3200 rpm with the manual trans I4. That is quite a lot for the long-stroke 4. Today for my 400 mile trip today I had the cruise set at 75-80 mph but I also had 400lbs of extra passenger weight in my car, and I used the AC for a while too. Plus, our roads aren't as flat as those in Florida. Had the cruise on the whole way, and the air was pretty good today. 30.0 was my average at the end of the trip. But with my tune I am seeing about a 1mpg increase in fuel economy.
 

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Just did a 70mph home trip, and I'm at 2100rpm. I'd venture a guess that at 75 I'd be at 2,300 and 80 if I recall is near 2,600 or 2,700. I never really go that fast, hah!
 

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At 80 I am at 3500 and 100 mph at 4200 rpm, right on the torque peak! Not that I know from experience ;)

[quote author=swoop1156 link=topic=53454.msg869781#msg869781 date=1154937689]
Just did a 70mph home trip, and I'm at 2100rpm.  I'd venture a guess that at 75 I'd be at 2,300 and 80 if I recall is near 2,600 or 2,700.  I never really go that fast, hah!
[/quote]
 
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