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Guest Message by DevFuse

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Register your Fusion Hybrid at the official Ford authorized registry here.


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Windows down or A/C on?


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7 replies to this topic

#1 OFFLINE   FusionHemi

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Posted 26 October 2015 - 07:30 PM

What will net me better mileage while driving 45-50mph?

 

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#2 OFFLINE   md13ffhguy

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Posted 26 October 2015 - 09:02 PM

It might depend on the temperature - i.e. How hard would the AC have to work? I seem to do pretty well with the windows down, even when it's in the 90s. However, I know a lot of people would never do that.

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#3 OFFLINE   FusionHemi

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Posted 26 October 2015 - 11:01 PM

Yeah that is definitely too hot. It was low 80s today and while moving it wasn't bad but sitting at the lights got a little uncomfortable.

#4 OFFLINE   lolder

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Posted 27 October 2015 - 08:26 AM

A good rule of thumb is to put all the windows down for a few minutes in a heat soaked car and then use the AC. At higher speeds open window drag is significant.



#5 OFFLINE   BoatDrinksQ5

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Posted 27 October 2015 - 09:09 AM

I think there have been some tests on this - I think the break-even point was around 50 or 55mph.  

 

I suppose the outside conditions and interior temperature set-point, along with dynamics of each car effects that greatly.


Edited by BoatDrinksQ5, 27 October 2015 - 09:10 AM.


#6 OFFLINE   Hybrider

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Posted 27 October 2015 - 10:05 AM

In my FFH, my experience during city driving at speeds of up to 50 MPH has been that having the A/C on drops my MPGs much more than having 3 of the windows open about 2-3 inches each.


2014 Ford Fusion Hybrid SE Ingot Silver (Appearance Package)

Ordered: 01/07/2014 | VIN assigned: 01/14/2014 | Window Sticker: 02/05/2014 | Build Date: 02/12/2014 | Arrived at Dealer: 02/25/2014 | Delivered: 02/27/2014


#7 OFFLINE   lolder

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Posted 27 October 2015 - 05:05 PM

If you have a moonroof, putting the back up and opening a rear window a crack is good in moderate temperatures.



#8 OFFLINE   FusionHemi

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Posted 28 October 2015 - 02:43 AM

If you have a moonroof, putting the back up and opening a rear window a crack is good in moderate temperatures.


Yeah I was playing with that this evening.




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