I have a 2005 F-150 XLT 5.4 liter with a 3.73 rear end ratio and 9800 miles. I purchased it new in July 2005. It gets 18 mpg on the interstate, but only gets 8 mpg consistantly in town. I am really disappointed. Is this normal, or could I have a problem that can be fixed?

 

4x4? Do you have larger after market tires? (anything over stock?). Proper tire inflation, clean air filter, etc. There are a lot of variables that can affect mpg.

 

No, I have nothing added and the truck is a 2 wheel drive. Any other ideas would be appreciated.
Ranger Ric

 

Well i just got rid of a Lightning, and I could always see 8mpg if i got on the gas, which was often in that particular kind of vehicle. Other then that, check your tire pressure and air filter. Other then that I cannot think of anything on an 05 2wd that would cause a MPG difference like that. Goodluck.

 

I have an 06 5.4L 2WD Screw with an AF1 and Magnaflow catback that I run with a TP 87 performance custom tune. I drive the truck as soft as it can be driven around town and only get 13 mpg. I think it's the nature of these trucks and you won't get much more than that no matter what you do...

 

That sounds about right. Although I get 14 to 15 in my 4x4 Screw and 19 on the highway. Ordering a set of pulleys later this week to help the highway situation.

 

i got a 99 f-150 ext.cab 104k miles 4.6L i think it has 3.55 gears not for sure....but i have changed: plugs,wires,maf,all o2 sensors,air intake sensors, k/n air filter, got a tornado fuel safer in intake tube , changed egr valve and sensor, pretty much every sensor on the truck.. have had the cats tested to see if were clogged... which arent.. both intake manifold gaskets had a fuel lean problem at one time.. the truck used to get bout 21-24 mpg bout 6 months ago using 87 octane ...but running 91-93 octane in it now i get 13-15 if im lucky... but as time progressed the truck has lost power... just has no guts.. any solutions..? ideas i'm all ears.. where did the power go how do i get it back?

 

That is a wide variation. However, if you do all stop and go in your city driving with no long stretches "at speed" and a lot of idleing at stop signs, I think that it is possible. I get 19.3 on the highway and 17.2 around town, but a lot of my town driving is on freeways and long stretches between stops.

 

Brandon, remove the tornado.....use 87 octane. make sure tires are properly inflated and heck, you've changed everything else, what about the fuel filter?

 

dude my fuel filter is good... tires are the right size 255/70R 16 have proper inflation.. my driving is mainly on interstate.. 70-80 mph speeds... not much stop and go traffic...

 

How are you figuring the mph's, sounds like you can't even go 200 mile on a tank of gas. Some folks here say there's a hi-tech gage in the newer truck's thats tells them their mpg's. Don't think I'd trust that, I like the old fashion way of filling the tank up and divide the miles.

 

A suggestion:
Reset the pcm(disconnect the battery neg terminal) wait 30 minutes.
This should reset the unit so that it can "LEARN" your driving habits.
I have a "05 KR supercrew with 5.4l and 3.73 rear end. My fuel economy has never been that bad. I drive a combination of city/highway.

 

i average bout 320 miles on 22 gallons of gas when i used to get bout 380 -425 miles to take.. i do like you divide the miles by the gallons

 

https://www.f150online.com/galleries....cfm?gnum=8345 heres what it looks like.. if you all are interested in checkin out my truck there are a couple others on my gallery

 

That comes out to be ~14.5 mpg...