Purchased a used 2013 Limited Expedition for the wife about 6 weeks ago. Mileage on the highway is around 13-14, but the last tank in town was just under 8mpg. Vehicle currently has 70,000 miles on it. Any thoughts? Motor runs smooth, power is good, etc.

I do have AutoEnginuity with the Ford Bundle. Anything I can check on my own before taking it to the dealer for a Fuel Economy Road Test? Any idea how they run that test?

Thanks in advance, I'm new to all the technology on this thing. My 99 7.3 is a lot easier to diagnose.

 

Hook that AE to the wife's right foot!


Just kidding. :-)


Have AE monitor the instantaneous MPG while SHE is driving.


(BTW, one tank full doesn't tell the story.
Too hard to tell if the tank is full,
depending on where you park at the pump.
Fuel tank is long and narrow,
with the filler neck at one end.
So depending on the slope of the land at the pump,
you can have a significant variation in when its "full".

Keep track of the fuel used for a 1000 + miles,
then top up the tank and figure the mileage.
Now if your off a gallon or two it makes little difference,
while it makes a big difference on one tank full

 

I would focus on driving habits before even considering a mechanical issue. I typically get 16-16.8 mpg average in my EL. However, if I reset it and really lay into the pedal it'll drop to 11-13 mpg.

 

So who wants to be the one to call my wife and tell her the news?

 

I have an '07 Navigator and the Auto Enginuity with Ford bundle. My Navigator has 75,000 miles on it.

I drive with a very light throttle foot. That gets me 12-13 in town and freeways at 70 mph, air conditioner on, in summer temperatures I get 19 - 20 mph.

Being as you have AE - scan it, check for codes, and look at the voltage swings on the oxygen sensors - especially the upstream ones. (google or YouTube for tech help).

My wife does not drive our Lincoln.The mileage may vary if she did.
Richard

 

Your wife. Your topic to address.

Remodel the doghouse BEFORE this conversation...

Just sayin'

 

2013 expy Highway cruising 70-75 mph getting 12-13 mpg cruse control on this is s**t fuel milage what can be going on here/ Any help appreciated.

 

What gears do you have?

I have the 3.73 with towing package andget around 16-17 on the highway at 70,but I seldom use A/C.

 

The Diff. is the 3.31 non LSD

 

How many miles? Have you changed out the diff fluids? Tire pressure?

 

About 87,000mi all service is up to date except spark plugs going to do that next