ChaseN

Let me just start off by saying I LOVE the ecoboost and am not bashing it.

For the last 3k miles, I haven't gotten better than 13.2 MPG.

My commute to work is 80 miles each way (160 miles a day) at 70 mph.

My mileage gradually went from 18.1avg to 13.2avg over a course of two days. I cannot take it to the shop for another week so I figured I'd ask here if there's a common cause for this.

No power loss. No odd noises.

16k miles on the truck.

Thanks!

byte

fuel quality maybe?

O.C.D.

Be thankful, I am gettin around 11.5 right now with the 5.0.

ChaseN

Can't be fuel quality because I fill up every other day and it's rarely at the same station. My 5.0 avg is 16.6.

chlngfyo2

The dealership wont help you. If it dropped that much i'd say fuel or maybe colder weather with more idle time? I'd try a can of lucas or royal purple fuel system cleaner in it, maybe just some bad gas.

ThatBlue4x4

Same here. I get around 16 in the summer though. I make a lot of short trips.

BRUTE448

x3 8-10 miles daily for work and gym all surface streets lights and 45mph tops

Jaythor74

Check your rims for excessive heat after driving. You may have a caliper hanging up. It will kill your gas mileage and won't cause any other obvious symptoms but a dirty rim and a pinging sound from the overheated rotor.

gardener

+2 on Lucas

did you check your tire pressure?

i drive 60-65mph (heavy cop zone) and if im not in stop & go traffic, i get 14.5 mpg...but as soon as i am in stop & crawl rush hour, it drops down to 13mpg.

jphelps14

iTrader: (1)

I get about 17-18 with my 5.0 and thats usually going about 55-65 mph.