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Old 07-03-2013, 11:20 AM   #1
bryanbag
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Fuel Filter and MPG question.

I have a 2010 Focus SE. 2.0L with 63,000 miles.

I brought my car into the dealer to have the oil change, tire rotation and Multipoint inspection done.
I requested the for the fuel filter to be changed out and to check out why fuel mileage drop off from 35 to 28 MPG.

I received the call from the dealer saying my car is ready, OK COOL.

They told me I have a non-serviceable fuel filter, this seamed a little weird since everywhere I look fuel filter are available and say to change every 30,000 to 50,000 miles.
What the deal here, did these car come with a (so called) lifetime fuel filter?

Mileage, they claimed they hooked the car up to there computer and the and ran what ever test to do and it came back as getting 33.2 MPG.
I know a dirty MAF, O2 sensor on it's way out can affect mileage. The MAF will be getting cleaned this weekend and possibly the O2 sensors changed out also.

Now I only drive the car Mon to Fri to work which is 140 miles round trip. The car doesn't get dogged on. That's what my Lightning is for. I set the cruise on 72 and off I go.
I know with the hot weather were having here in South Louisiana can have an effect on MPG but 7MPG is a bit much.

Any added info would be great.
Thanks
Bryan


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Old 07-05-2013, 10:13 AM   #2
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Yeah your fuel filter is in the tank w/ the pump. How 'bout a Steeda sri for more mpg. What kind of mpg do you get going 60mph? You have more wind restance at 70+ then you do at 60.
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Old 07-05-2013, 05:47 PM   #3
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http://www.wikihow.com/Increase-Fuel-Mileage-on-a-Car

Are you going off the computer ? Excessive use of the a/c can put a hamper on mileage, I'm at 83k and with some hypermiling my trip computer is currently sitting at 38mpg (probably going to actually be about 33mpg to the tank). I'm about to go fill up right now, I'll let you know how that goes.
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Old 07-05-2013, 10:50 PM   #4
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Quote:
Originally Posted by 09vistabluecoupe View Post
http://www.wikihow.com/Increase-Fuel-Mileage-on-a-Car

Are you going off the computer ? Excessive use of the a/c can put a hamper on mileage, I'm at 83k and with some hypermiling my trip computer is currently sitting at 38mpg (probably going to actually be about 33mpg to the tank). I'm about to go fill up right now, I'll let you know how that goes.
Wow, 38mpg is pretty good. The most I can get is 35 at 70 down the freeway. Is hypermiling shutting the motor off down hills & coasting or what?
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Old 07-06-2013, 11:13 AM   #5
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Quote:
Originally Posted by felixthecat View Post
Wow, 38mpg is pretty good. The most I can get is 35 at 70 down the freeway. Is hypermiling shutting the motor off down hills & coasting or what?
Pretty much all newer engines will shut the fuel injectors off while coasting downhill if you're in gear. But yeah some hypermiling tips are.

Coast back down to a stop, don't slow down as much for turns, keep your tires aired up, don't drive above 45mph with the windows down, use the a/c as little as possible, don't speed (drag increases exponentially with speed), skip shift(get up to speed limit using 1st & 2nd then shift to 4th, or maybe 1-3 then skip to 5th depending on how fast you have to go).

I've got an all time best of 39.4mpg, or almost 500 miles, to a tank before.
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Old 07-06-2013, 02:16 PM   #6
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well,maybe in may the above 45 mph with windows up would work,but around here you would be sweating if you drove with the windows up after may. I have always wondered at what speed does the drag from the windows down use as much gas as using the A/c? I hardly ever use A/C unless kids are in the car or it is VERY hot(95+).
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Old 07-08-2013, 04:24 PM   #7
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I may have overlooked it but are you auto or manual? about 43 mph right after the torque convertor lets up will get you awesome mileage around town. Then do the same on the highway. Get it just to where it shifts to the next gear but at the lowest mph. This will keep your RPM in optimal MPG range(= Lighter wheels made the biggest difference for me. Plus all my other mods. If it adds power then it makes it run more efficient(mostly) cai,header,exhaust,tune,etc. will increase MPG's if you drive properly and don't floor it with the new found power.
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Old 07-08-2013, 04:26 PM   #8
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Best lately is 45mpg at 72mph down the highway for a 54miles stretch of hills and such.
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Old 07-08-2013, 04:28 PM   #9
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Fuel also makes a big difference. I'm not saying run 93 octane because that is only beneficial if you are tuned for it. But I get noticably better mpgs and power when I use SHELL gas (which is almost always), but if I get gas at wally world or other gas stations where it is a little cheaper I get 4-8mpg less and noticbly less power.
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Old 07-08-2013, 04:41 PM   #10
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sorry,mine is a manual 5 speed. I ran 93 octane a few tanks last year just as a test,no difference in mpg's. I don't notice a big difference in fuel brands around here,but I do mostly try to use shell. I am averaging 31-32 mpg's which is good,but more is always better!! :)
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