What kind of fuel mileage are you 5.4L Expedition owners getting in the city and highway driving? My Father has purchased a 00 5.4L and is getting 14 on highway and 11 in the city and he wants to know if these are typical numbers. I'm getting about 16-17 highway and 12-13 city with my F150. I know this topic has been addressed in the engine section already but I'm not sure if Expeditions get similar mileage to F150s. Any info would help a great deal. Thanks!

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99XLT 4x4, 5.4L, Ext Cab/Short Box.
K&N Air Filter, Mobil 1 (5W-30), Motorcraft Filter.
Assembled 6/99.

 

hwy 14.9
city 12



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1999 EB X 5.9 4.1 gears, Borla catback, Vortech supercharger,superchip

 

Atleast I'm not the only one getting lousy mileage.

11.2 city
12.7 hwy

1999 F250 LD S/C XLT
5.4L, 3.73, 4R100 trans.
Superchip, Flowmaster, K&N, Poweraid

 

16.2 Highway
12.5 City

400 miles to the tank-full...

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2000 Wedgewood Blue Expy XLT 5.4L 4WD, C&C group, towing package, beige leather interior, captain's chairs, 6 CD Changer, 255/70R16, all-weather floor mats

MODS
Ford Bug Deflector - 2/15/2000
Superchip - 3/11/2000
Airaid - 3/23/2000
Edelbrock IAS shocks - 3/23/2000
Jardine cat-back exhaust - 4/6/2000
Under Seat Locking Storage Drawer - 6/6/00

 

Ran my 98 EXPY 4X4 5.4L 3.73 from Buena Vista Co to Vegas and back in April, running 75-80 across Utah and Nevada, last 100+ miles on the return was in 4X4 over mountain passes in a snowstorm, got 15.8 for the entire trip.

 

between 12-13 city
highway 15-16

Might get better if less than 10k miles on that 2000.

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99 Expedition XLT
5.4L
4X4
3.73LS
17"AT/S
Airaid Intake
Superchip
Custom Edlebrock shocks
Magnaflow 3"
Helwig Sway Arm
Polk speakers