I am just curious what kind of miliage people are getting on a new F-150 5.4?
I am getting about 13.7 -15.0

 

I'm averaging 13.75. the best I've gotten is 14.5. Truck has 1,500 miles, I'm hoping for some improvement as miles increase.

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2000 Lariat F150 4x4, S/C, 5.4L, 3.55 LS, ORG, Cab Steps, Towing, Elect 4x4,Black/Gold.

 

Taxan

I am happy to report to you there is hope for your truck. Mine has a little over 11,000 on it right now and I have been able to get 17.45 @ 70. I also have 3.73LS witch kills any hopes of going much higher. But who cares? I love how strong this truck is. Without the addition of the electric fan, I could not get above 16.
Russ
St, Louis


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99 4X4 XLT S/C with ORP
5.4L 3.73LS
Flow Master Dual Exhaust
K&N Filter w/ Intake Mod
Flex-a-Lite Black Magic Electric Cooling Fan

 

Sorry Texan
for messing up your user name. I can't spell this evening.

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99 4X4 XLT S/C with ORP
5.4L 3.73LS
Flow Master Dual Exhaust
K&N Filter w/ Intake Mod
Flex-a-Lite Black Magic Electric Cooling Fan

 

Texan

I am happy to report to you there is hope for your truck. Mine has a little over 11,000 on it right now and I have been able to get 17.45 @ 70. I also have 3.73LS witch kills any hopes of going much higher. But who cares? I love how strong this truck is. Without the addition of the electric fan, I could not get above 16.
Russ
St.Louis


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99 4X4 XLT S/C with ORP
5.4L 3.73LS
Flow Master Dual Exhaust
K&N Filter w/ Intake Mod
Flex-a-Lite Black Magic Electric Cooling Fan

 

5.4 w/3.55 averaging 14mpg

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2000 F-150 XL,RC,LB,5.4,4R70W,3.55LS,
4-wheel disc/ABS,Chestnut/Parchment,
Ford bedliner & gas/wheel/spare locks,
3" cold air box modification,Superchip,
Dynomax ultra-flow welded 3" cat-back.

 

2WD 5.4 with 3.55LS average 17 MPG on 87 octane Mobil. Driving 45-75 mph ~30 miles each trip. Mostly rural highway, some city. Rarely get above 3500 rpm.

 

1999 5.4 with 3.55's. gettin 17 mostly highway. 13500 on it now
jeff


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1999 F-150 Lariat 4X2
Reg cab Short box Styleside
5.4L 3.55ls
Deep Wedgwood Blue/Silver
Lund Interceptor hood shield
VentVisors
Class III hitch
Ford molded mud guards
Soft tonneau cover
Factory CD with changer (thanks Dusty)
Tinted windows
Factory fog light kit

http://www.fortunecity.com/silversto...ton54home.html