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I can understand a drop in fuel economy with AC running with city driving. But highway MPG driving should not really be effected by the AC. It should be a marginal difference, or negligible. But yah in the city idling around it would be a different story.

I certainly had slightly better expectations for fuel economy than I see. My 5.0 V8 F150 4x4 wasn't worse, seems about the same. In fact I think the v8 was better on the highway. And my F150 was a super crew long bed, 4x4.

I think I'd actually like to see them put the v8 5.0 into the transit van. I actually would have to try driving that and would consider it over the EB.
 

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Discussion Starter #22
What tire pressures are you running? I'd also check the air filter and make sure it's not moist. I don't remember whose post it was but I recall an MPG drop with a soggy filter.

It seems to me you may have several small things contributing. I love the usage of "attacking" those hills, lol.

Yeah this AC seems like it has to work pretty hard. I've heard of a dropoff in mileage due to AC but it's kinda ridiculous. Probably due to a lack of insulation?

I think I'm running 55 in the fronts and 70 in the rears. Air filter was just changed at the dealer two weeks ago asking with the rest of the parts for the water issues recall. It just seems really strange that the van if so gutless up the hills. WV hills aren't the Rockies and this thing shouldn't be having THAT much trouble with them.

Fwiw, the service tech said he couldn't do anything about the mileage unless I has a cel showing, which there's not.
 

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Yes good luck getting Ford to do anything about poor mileage. My dealer spent some time with Fords hotline in regards to my vans MPG (10-12), and was told it could be due to roof rack (factory rack) and or my conversion, (800 pounds), and are not willing to do anything unless a code shows up, they referred dealer to owners manual in regards to fuel economy and driving tips.

I have been to dealer now 11 times since I bought this van with various issues, and have discovered that Ford does not care about you at all once you gave them your money for your purchase, 10-12 MPG is normal? Ecoboost my ass there is NOTHING ECO about that.

10 mpg under a diesel is a lot of $$ going out of the window
 

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I have a 2016 transit 250 with 34700 miles. I average between 13 and 14 mpg. It’s a 3.7. I don’t like the mileage and whenever I hear other people getting between 17 and 18, I also have to wonder why. We’re you ever able to do something to change your mpg ? I drive hilly country as well.
 

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since this is a mileage thread, I wanted to say that if you really want a good way to check your mileage, download the free "fuelly" app and use it to enter cost/gallons/mileage every time you get gas. its easy to use and I do it while the pump is filling. It makes it really easy to "hand track" the mileage so you know its correct. I also track oil changes and other maintenance in it as well.

http://www.fuelly.com

and click on the mpg in my sig to see my fillups and mpg over time.
 

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I didn't have a noticeable mpg drop in my Sprinter when using AC, both front and rear. And I don't notice a difference in my Transit, either. If there is any, it's less than 1mpg. I get the same mpg in 100 degree weather with AC on as I do in the winter with the heater on. Or when I have neither on. AC is either on or off, there is no gradient. Fan speed DOES have different settings, though. I suspect running the fan at it's highest setting uses less energy (alternator drag) than turning on the headlights.
The only thing I've noticed that gets me better or worse mpg is how much weight I have in the van.

At 49k I'm at 15.3 average mpg. Some highway trips have been 17-18mpg on a tank.
 
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