barwise88

Hey everyone, I purchased my 2011 ecoboost fx4 a couple months ago and the MPG's is really started to be a pain in the A** I drive it very very easy, Im in west texas where its flat. I have a 2.5" leveling kit and stock tire size BFG All terrains. I drive from Fort Worth to Midland which is 300+ Miles. I jump on the highway put it on 75 mph and reset the MPG. I was pulling 15 flat with my stock michelin tires. Since then, Ive added an AFE Stage 2 and turbosmart BOV's. With that being said, I pull 13.8 MPG. So much for the intake helping!! I then Bought an SCT tuner and it hasn't raised any! Whats wrong here? Is there a different tune I can buy to help? My buddy has the same truck and he gets 18 running 85 bone stock and it pisses me off! What can I do to help my mileage. Please no insults or tell me to buy a car for mileage. I need a truck but I need a little better mileage! I just sold my sct tuner as I was not impressed with any of the tunes installed. I drive 175+ miles a day all highway. If I could get to 17 I would be more than happy! My old Ecoboost was a 2011 and it wasnt much better!

Willard5.0

Lose the level kit. It is letting a lot of air under the truck causing turbulence and massive drag. I'd say you would gain 2 to 3 MPG back returning to stock height.

AricsFX

iTrader: (3)

Prius?

barwise88

Did you not see where I said I needed a truck. Why even post a stupid response when i clearly stated that above to weed out stupid answers like that? Even before leveling kit I pulled the same MPG. I have the 3.73 rear end. I wonder how much it would cost me to switch to the 3.55. I drive too much to only get 13.8.

Rossco

Ah if the truck is stock and in 'Tip-Top' condition then the only way to get good MPG is either a change in driving style or an Eco tune. The motor will generically run a little rich.

Gears are another way but looking at good $$$$ for both & labour.

RLXXI

The canned tunes are run of the mill, nothing special, custom tunes are the way to go. I have an SCTx4 with custom tunes, this is stock.



This is with a custom tune.



The last pic I set cruise at 60mph, reset the meter, and drove flat land for 25 mins hwy only for a true hwy mileage sample.

With a 5.0

barwise88

Can you give me more information on the tuner you have? what tunes did you get and where to buy? I had the sct TS, no custom tunes and I wasnt impressed. I have been looking at the SSI, Livernois and 5star tunes. I dont know which ones to go with yet. I just need sometheing to help.

seaeagle2

According to studies backed by the department of energy, the average car will be at its advertised MPG at 55 mph. But as the speed increases:

- 3% less efficient at 60 mph
- 8% less efficient at 65 mph
- 17% less efficient at 70 mph
- 23% less efficient at 75 mph
- 28% less efficient at 80 mph

SteveLord

What gears do you have? And your buddy's?

barwise88

Mine is a FX4 so it has the 3.73. Not sure about his. Prob the 3.55. But with that being said, mine shouldnt get 13.8. Thats just horrible.