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Old 11-11-2013, 03:28 PM   #1
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How to impove MPG? Can the DCT be an ironic cause?

Howdy. Since June or July, I've noticed a drop in MPG despite doing less city driving (down to 28 on average, instead of the 30~31 I had gotten used to).

I've about 10,500 miles and the car will be 2 years old in February. (the car developed "the noise" at 500 miles, between gears 1 and 2 on the transmission.)

It's possible that stop and go traffic from all the construction and other dingdongs that don't know how to plan but set up miles of nothing hasn't helped matters, and with gas stations converting to winter blend gasoline in the near future I should expect another drop. But it's been a few months, with only 2 times when MPG was above 30.0...

Has anybody else experienced reduced MPG over time, especially if the DCT transmission is a factor in long-term performance problems? Which is sad, given the DCT was designed to improve MPG...

Thanks!


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Old 11-11-2013, 03:45 PM   #2
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Yes. Mine has never been as good as yours... I get around 28 or 29 city (well I used to).

Now i end up getting around 26. I plan on having the car brought in at some point so I can have the dealer check it out. My DCT has been acting up more than usual :(

The downward spiral begins.
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Old 11-11-2013, 04:07 PM   #3
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i have 10K on my car now and haven't seen any decrease in mileage since new... my city/hwy/combined mileage is steady
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Old 11-11-2013, 04:09 PM   #4
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Quote:
Originally Posted by unfocused1 View Post
Howdy. Since June or July, I've noticed a drop in MPG despite doing less city driving (down to 28 on average, instead of the 30~31 I had gotten used to).

I've about 10,500 miles and the car will be 2 years old in February. (the car developed "the noise" at 500 miles, between gears 1 and 2 on the transmission.)

It's possible that stop and go traffic from all the construction and other dingdongs that don't know how to plan but set up miles of nothing hasn't helped matters, and with gas stations converting to winter blend gasoline in the near future I should expect another drop. But it's been a few months, with only 2 times when MPG was above 30.0...

Has anybody else experienced reduced MPG over time, especially if the DCT transmission is a factor in long-term performance problems? Which is sad, given the DCT was designed to improve MPG...

Thanks!
It's very possible that your location has switched to winter blend fuel already. Many parts of the country are already having below-freezing overnight low temps in the forecast. That could explain your drop!

Also, the transmission wasn't 'designed' to improve MPG. It was probably more like a happy accident. Engineers have always known that a clutch transfers more power more efficiently than a torque converter, thus a clutch is better. But, Americans in particular don't like to drive manual transmissions. So, for a while now, there have been 'automated manuals' (which is what the DCT is). Ford is incorporating it because, in theory, it's the best of both worlds. Doesn't require the driver to have to do anything, but still uses a clutch to transfer power. Since it's a nice 6 speed box, they've managed to actually squeeze a 1mpg EPA estimated increase; but I think the goal was probably to have similar performance to the manual, to differentiate them from the competition. (Ever see their or/and commercials? Unlike the other cars, you can get an automatic, but get manual transmission gas mileage!).

It's not a money saver though. It's just less of a money-waster. With a 1mpg increase, and the average of 12,000 miles per year for most Americans (and folks in the city like it sounds like you are? Are averaging about half that; which sounds like you are!), that's a savings of about 7 or 8 gallons. Let's assume $4 a gallon just to make it easy, and you'll have to drive a flawlessly operating DCT car getting EPA gas mileage 100% of the time and not a drop less for 62.5 years to break even over the manual. In other words, you still spend less money at the end of the day with the manual (Which is thousands cheaper). HOWEVER, spending a couple grand to get an automatic if that's something you want (And why not? I spent more to get an SE, sport package, etc. that I wanted.. it can't ALL be about money), and not getting a hit in MPG? Well that's a pretty good deal!
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Old 11-11-2013, 04:10 PM   #5
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Nearly 25,000 on mine. MPG is the same as when it was 2,000.
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Old 11-11-2013, 04:16 PM   #6
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Originally Posted by unfocused1 View Post
Has anybody else experienced reduced MPG over time, especially if the DCT transmission is a factor in long-term performance problems? Which is sad, given the DCT was designed to improve MPG...
It's curious that you focus on the DCT as the possible (likely?) culprit.

Do you have any theories as to how the DCT might be the cause?
Have the shift points changed noticeably?
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Old 11-11-2013, 04:26 PM   #7
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Quote:
Originally Posted by unfocused1 View Post
Has anybody else experienced reduced MPG over time, especially if the DCT transmission is a factor in long-term performance problems? Which is sad, given the DCT was designed to improve MPG...
Quote:
Originally Posted by liquidblue88 View Post
.Now i end up getting around 26. I plan on having the car brought in at some point so I can have the dealer check it out. My DCT has been acting up more than usual :(
Hi unfocused1 & liquidblue88,

Let me know when you have your vehicles checked out by your dealers and I'll look into possible avenues of assistance.

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Old 11-11-2013, 05:16 PM   #8
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What's the avg temp been? I find that when the temp drops below 55-60degrees my avg fuel goes from about 39mpg to 35mpg throughout the whole tank. Plus winter blend fuel will hurt mpg too
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Old 11-12-2013, 08:17 AM   #9
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Mine has 56k miles and has always been over 35MPG, even with winter blend. I think how you accelerate effects the mileage in a huge way. I get to 50MPH in about 15-20 seconds.
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Old 11-12-2013, 08:29 AM   #10
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Mine has 56k miles and has always been over 35MPG, even with winter blend. I think how you accelerate effects the mileage in a huge way. I get to 50MPH in about 15-20 seconds.
i agree.. drive like a grandpa, or at least don't lean on it , and it returns very good mileage both city and hwy... the slightest bit of aggressive driving, tho, and the mileage drops considerably...
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