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Lower MPG #5239580 10/14/19 05:02 PM
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borgward Offline OP
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2013 Fiesta SE Hatch Manual Trans 1.6 Liter Engine 55,000 miles. Bought brand new. The odometer has consistently reported 37 MPG overall mileage until lately. It is now showing 35 MPG overall MPG for the last several months. Seems a little early for spark plugs. No fuel in the oil. Hardly measurable oil usage between oil changes that I do my self. Mobil 1 From the first time I changed oil. Next oil change is due in several hundred miles. Oil analysis always come back very good. I plan to check the compression at next oil change.

I do suspect gasoline quality is heading south in Texas (Shell Regular) - I drove up to Kansas and out west to the Pacific coast last year. Car ran better on gas once I was going west. Even in California. As I entered Texas on the way back I got less pep and poorer MPG.

Anything else I should check?

Re: Lower MPG [Re: borgward] #5239587 10/14/19 05:06 PM
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ctechbob Offline
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Not sure if/when they roll out winter blend gas where you're at or not, but that is a possibility.


2008 Acura TL Type S-155k*
2003 Honda Accord V6-207k
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Re: Lower MPG [Re: borgward] #5239588 10/14/19 05:11 PM
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borgward Offline OP
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I have been through 7 winter blend cycles here (if there is one here) and consistently got 37MPG overall - all seasons, until recently.

Re: Lower MPG [Re: borgward] #5239622 10/14/19 05:55 PM
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CARJ Offline
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Did you get new tires and/or have you checked your pressures recently?


2004 Toyota 4Runner | 193k | Havoline Pro DS 5w-30, YZZD3
2012 VW Passat | 96k | M1 0w-40, XG9911
1997 Honda Civic HX | 222k | M1 0w-30, PH3593a
Re: Lower MPG [Re: borgward] #5239626 10/14/19 05:57 PM
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Dinoburner Offline
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Curious if anyone else in that area is suffering the same problem.


77 Chev stepside 454 Casteroil syn
95 GMC 4wd mobil syn
2016 Equinox LTZ V6 dealer
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Re: Lower MPG [Re: borgward] #5239633 10/14/19 06:00 PM
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mjk Offline
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Have you checked the scale lately ? wink

Re: Lower MPG [Re: borgward] #5239638 10/14/19 06:04 PM
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domer10 Offline
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Try a fuel system cleaner such as Amsoil additive, or techron....and bump it up a grade while running it. Tire pressure also, with temp change tires tend to deflate a bit.


2013Jeep Wrangler Sahara Unlimited
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Re: Lower MPG [Re: borgward] #5239656 10/14/19 06:19 PM
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MParr Offline
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Is your clutch slipping? At 55,000 miles that is possible. Seasonal gas blends can make a difference. What is the ethanol content of the fuel that you have been using?

Last edited by MParr; 10/14/19 06:21 PM.

2019 VW Tiguan SE Now: Mobil 1 ESP 5W30 & OE VW/Mann
2017 Ford Escape SE 2.0T Now: Motorcraft 5W30 SynBlend & NAPA Gold 1348
Re: Lower MPG [Re: CARJ] #5239662 10/14/19 06:25 PM
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borgward Offline OP
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Originally Posted by CARJ
Did you get new tires and/or have you checked your pressures recently?

New tires a year ago. Pressure is on spec.

Re: Lower MPG [Re: mjk] #5239675 10/14/19 06:34 PM
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borgward Offline OP
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Originally Posted by mjk
Have you checked the scale lately ? wink


What scale? a measuring device, scale on something in the engine

Re: Lower MPG [Re: borgward] #5239681 10/14/19 06:40 PM
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dareo Offline
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is that year direct injected? if so, maybe carbon buildup?


2018 Regal TourX, 2016 Golf Wagon 5MT, 2016 GMC 1500 SLT 6.2
Re: Lower MPG [Re: borgward] #5239690 10/14/19 06:47 PM
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AC1DD Offline
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Originally Posted by borgward


Anything else I should check?


I'm thinking sticking brake caliper or bad wheel bearing?



Last edited by AC1DD; 10/14/19 06:47 PM.
Re: Lower MPG [Re: borgward] #5239735 10/14/19 07:32 PM
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vwmaniaman Offline
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Have alignment checked. Maybe a pothole got ya.


Don't waste your time on a slipshod repair.
Re: Lower MPG [Re: borgward] #5239737 10/14/19 07:32 PM
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vwmaniaman Offline
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Weak battery needing more from your alternator.


Don't waste your time on a slipshod repair.
Re: Lower MPG [Re: borgward] #5239740 10/14/19 07:38 PM
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tiger862 Offline
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Sounds like carbon build up.


Tiger862
2018 Grand Caravan
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