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Old 11-10-2012, 04:31 PM   #1
Darth_Focus
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Ridiculous fuel mileage

I've got 3400 kilometers on a 2012 Ti hatch and I must say I'm far more than dissapointed in the mileage I'm getting. It's actually atrocious. I understand the driving style effects mileage...yadda...yadda..yadda, but the sticker says 7.3 L/per 100 KM city and I'm flirting with 11 L/100. 10.8 to be precise. Thats F-150 V8 territory. I don't drive like miss Daisy but I don't drive like The Bandit either. I know 7.3 is a perfect world but I'd expect something close to that albeit a little more. I'm lucky to get 400 kilometers to a tank with 150 of that on the highway. I got rid of a car in part to fuel mileage only to end up with the same thing, but with payments again. Its the DCT and it runs great and is a joy to drive mind you, but this mileage is really not sitting well with me.


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Old 11-10-2012, 04:50 PM   #2
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Originally Posted by Darth_Focus View Post
I've got 3400 kilometers on a 2012 Ti hatch and I must say I'm far more than dissapointed in the mileage I'm getting. It's actually atrocious. I understand the driving style effects mileage...yadda...yadda..yadda, but the sticker says 7.3 L/per 100 KM city and I'm flirting with 11 L/100. 10.8 to be precise. Thats F-150 V8 territory. I don't drive like miss Daisy but I don't drive like The Bandit either. I know 7.3 is a perfect world but I'd expect something close to that albeit a little more. I'm lucky to get 400 kilometers to a tank with 150 of that on the highway. I got rid of a car in part to fuel mileage only to end up with the same thing, but with payments again. Its the DCT and it runs great and is a joy to drive mind you, but this mileage is really not sitting well with me.
i hear alot of folks complain about the mileage on their Ti but for some reason, not so many who own other models... my sister has a Ti and drives almost 100% city (greater NY) and gets 23-25 mpg consistently.. I have an SEL and drive mostly suburban and get EPA advertised mileage, usually upper 20s city ('cept in dead of winter when it's in the 23-24 range) and 39-42 hwy (slightly over legal limits) and avg 30 overall.. so im happy...
i've not idea why, discounting driving style and terrain that folks get such wildly differing mileage.
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Old 11-10-2012, 04:57 PM   #3
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Do you have the Handling package? The 18" wheels do effect mileage by probably 1-2 mpg compared to the base 16" tires.

I have a TI - non-handling package. City mileages averages 26- 28mpg and highway 34 - 38mpg. I'm averaging 31.6mpg with 14K miles on the car.
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Old 11-13-2012, 12:41 PM   #4
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Do you have the Handling package? The 18" wheels do effect mileage by probably 1-2 mpg compared to the base 16" tires.

I have a TI - non-handling package. City mileages averages 26- 28mpg and highway 34 - 38mpg. I'm averaging 31.6mpg with 14K miles on the car.
Wow that's awesome! 31.6 MPG is really good.

Just out of curiosity, a friend told me that bigger tires will actually give you better mileage, is that true?
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Old 11-13-2012, 12:55 PM   #5
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Just out of curiosity, a friend told me that bigger tires will actually give you better mileage, is that true?
A larger outer diameter on the tire? Highway gas mileage, yes. But you need to watch out for tire rub and bottoming out on bumps, etc. It also causes higher stresses on the engine/clutch/drivetrain as the car will be receiving higher loads than expected at the theoretical speed. So your odometer will be off and if something breaks, Ford could deny warranty claims.

That said, it lowers your city has mileage because the car requires more work to stop and go. Look at the tires on cars like the Tata Nano, Yaris, etc. They’re relatively small for a reason. The only times bigger tires help gas mileage in city driving are when you have a hybrid with regenerative braking. Then, the car can regain this otherwise lost energy. But, generators are not 100% efficient, so you will never gain as much energy as you spend if you just had smaller tires from the beginning. Did that make sense?

EDIT: Otherwise, keeping the same OD and getting bigger rims will lower gas mileage as will a wider tire.
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Old 11-14-2012, 07:22 AM   #6
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Wow that's awesome! 31.6 MPG is really good.

Just out of curiosity, a friend told me that bigger tires will actually give you better mileage, is that true?
I averaged better than that with my 18 inch stock wheels and Michelin ultra high performance 18 inch tires. Anyone that thinks changing the 18" low rolling resistance tires to other Focus OEM all season tire sizes will yield them a 1-2 MPG improvement may be sadly mistaken after spending the money. And they will definitely be missing a lot of braking and cornering performance.
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Old 11-10-2012, 04:58 PM   #7
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I have a sel with a dct and drive mainly highway and mpg stays between 36-39 mpg.
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Old 11-10-2012, 05:05 PM   #8
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I have the handling package. But, an 18" summer rated hard sidewall, low profile tire will no doubt offer less rolling resistance than other setups. That should aid in mileage unless the rims are made of cement. We are talking 21 mpg here. That is brutal. I'm not even taking it above 4000 rpm, and that's spirited driving. I'm in Ontario. Its pancake flat here. Like I said, car runs great and I really quite enjoy driving it but something is amiss here.
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Old 11-11-2012, 09:16 AM   #9
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I have the handling package. But, an 18" summer rated hard sidewall, low profile tire will no doubt offer less rolling resistance than other setups. That should aid in mileage unless the rims are made of cement. We are talking 21 mpg here. That is brutal. I'm not even taking it above 4000 rpm, and that's spirited driving. I'm in Ontario. Its pancake flat here. Like I said, car runs great and I really quite enjoy driving it but something is amiss here.

I think something is broken besides the low tire pressure if you're getting 21 MPG on E10 gasoline (not E85 or anything w/ more than 10% alcohol). I have never received less than 28 MPG over a tankful or two in my Ti w/18" tires. The Michelin Pilot Sport 3 tires use a low rolling resistance rubber and design despite being an "Ultra-High Performance Sport" tire, so the drag everyone talks about when using those tires is not likely there at that 1-2 MPG level if they're any worse at all over the other OEM tires.. That tire gets a 9 out of 10 on rolling resistance ratings at Michelin. I recently put narrower 215/50x17" Blizzak WS-70 snow tires on my car and the gas mileage got slightly worse. That could be simply due to colder temps. though.

Normal MPGs for me lately with a full throttle blast here and there (every day) and my winter tires on are 29-37 (using mid-grade gas). The MPGs really drop in constant stop and go traffic so if all your driving is that that's a part of the problem too. I have around 5000 miles on mine and it seems to run better all the time. Yours will most likely improve too (you've only got 3400 kilometers on it) as the engine wears in (breaks in) more.
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Old 11-10-2012, 05:30 PM   #10
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So I decided to employ the K.I.S.S rule and check my tire pressure. Low and behold each one was 10 psi under the recommended cold tire pressure setting. I don't know if that's the entire problem, but I'm sure it's a start.
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