Mpg?

[cbiii]

Im seeing people claim anywhere between 14-20 mpg so im wondering why im only seeing 11.7-12 mixed (mostly highway) in mine? I just changed plugs about 300 miles ago and oil 2 days ago.. Ill be tossing in a new air filter tonight or tomorrow also but I dont see that being the issue.

*edit* 99 5.4 EB.

 

[aircargoo]

if im on "e" and i put $20 in.....i get 85 miles its 8 gallons....or maybe liters come to think of it.
better cb....use your mind.

 

[cbiii]

if im on "e" and i put $20 in.....i get 80 miles.

thats chancing it to...85 if not mistaking.the ONLY weight i carry is spare...trucks empty.city miles ONLY...and not pushing hard from full stop or light.

over 8 gallons...8 1/4 gal.

...none of that makes sense.

 

[GAINMOB]

it mainly because we have modded our trucks...we all have aftermarket intakes or performed the GOTS MOD, changed our exhaust, and have programmers...at a minimum.

 

[cbiii]

it mainly because we have modded our trucks...we all have aftermarket intakes or performed the GOTS MOD, changed our exhaust, and have programmers...at a minimum.

in my experience, modding cars HURTS fuel exonomy.. what were people getting before mods?

 

[WCAWI]

I've had 5 Expeditions over the years. Just a K&N filter was the only thing changed. I've always gotten 11.8 - 12 mpg city hiway combined. On highway I can pull around 15 if not pushing it.

in my experience, modding cars HURTS fuel exonomy.. what were people getting before mods?

 

[fiveohpoepoe]

This is my 4th 1st generation. Most I ever got on the hwy was 16.2 and that was in my 99 with the 5.4 on 33,s. Lowest I have in town was 9.5 with one of my 98,s with the 4.6 and stock tires.
At most a Flowmaster and K/N with the above numbers.
Now I have the Motts and a good idea of the mpg prior to it. Also have a new SCT, but havent driven enough to check the mileage

 

[GAINMOB]

i have k&n intake, flowmaster exhaust, superchips vortex programmer, AND 24's and i get 19 city and 23 hwy...

 

[Expedition]

i have k&n intake, flowmaster exhaust, superchips vortex programmer, AND 24's and i get 19 city and 23 hwy...

i call bs........ i have way more then that and i barely see anything close to 14

 

[Expedition]

and i have a custom tune too...

 

[tritonman5.4]

try using the cruise control believe or not it your vehicle get its best mpg when you use it because the throttle is a constant position

 

[Racenut]

For me it depends on how hot the day is. All I have done to my 5.4L is the CAI and wrapped it to keep temps down and the Flowmaster which when I put that on I eliminated the factory Y and run a 2I/1O Flowmaster. Most summer days on the interstate @ 75mph I get 15 but on a day like today where we had pretty mild temps ( 85F ) I was getting 17.6 @ 75mph. Also if I am not in a hurry and feel like ******* people off and run 65 in a 75 it jumps from 17.6 up to 20.3 ( only on cool days - come on winter ). I am looking forward to getting a programer so hopefully those numbers will climb a little higher.

One thing I noticed as well, and only applies to 1st gen.

If you are not using your 3rd row take it out, that seat is pretty heavy and you gain a little by getting rid of dead weight. Plus it gives you more room for subs

 

[walkin' trails]

I've got an 03 XLT 4x4 5.4. I've never got better than 18 on the highway and that was with a Gibson cat-back, a K&N filter (stock air intake), and Royal Purple oil. My guess is that with something closer to a 3-1 gear ratio, the igniton system firing to specifications, better air flow, and removal of the cats, it would get better.

 

[cbiii]

yeah, my cruise control doesn't work but i go to school and work all within 8 mi of my home so I dont have a chance to USE cruise. I plan on taking my 3rd row out tonight as well as finishing up my Gotts mod (it took FOREVER with my pos dremels so i gave up). I was just checking to make sure that theres not more problems with the truck

 

[03blkstanggt]

the way my truck sits right now im getting 14.7 mpg

before i changed the tires i was getting 15.5 at best and that was from maryland down route 95 to florida, doing 75-80 the whole ride

 

[GAINMOB]

i call bs........ i have way more then that and i barely see anything close to 14

i knew you were a hater...call whatever you want...doesnt matter...

 

[fraziarwp]

My new to me 03 XLT, 5.4L gets 11/14. Hope to improve with some mods soon.

 

[panda24619]

i know if you cut out weight you get better mileage. i like to keep my 3rd row out but my sub sounds better with it back that far. sounds almost like a port. but the gotts mod increased my mileage by 1 mpg. worth it? hells yeah. now im at a tad over 11. i want to say 11.2 at most on the freeway. i need to add air to my tires see if that helps any. cause with 38 lbs im wearing on the outside.

 

[Expedition]

i knew you were a hater...call whatever you want...doesnt matter...

i'm not hating i just want to see facts. I keep the rpms below 2 and keep it between 65 and 70 on the highway. I check my mpg by hand last time I filled up and averaged 13.6 mpg.

How is everyone checking their mpg? by hand? or the computer in the dash?

 

[GAINMOB]

i'll recheck the hwy mileage as i head to montgomery alabama tomorrow...new stats on sunday...