2.7Ecoboost

Yeah I bet the screw and 4 wheel drive is costing me a few mpg's. Every one that has the shorter cab and 2x4 seems to be doing a fair amount better. Gotta pay to play.

Fend2ride2

Yeah mine is 4x4 also

2.7Ecoboost

That is impressive with 4X.

Fend2ride2

Any idea why my trips with outside temps in the 70s can get me an average of 3-4 mpg's higher?

Some days I cant get above 22 then other days my average mpg's real-time meter will stay pegged at the 30 mpg mark with not much effort at all.

2.7Ecoboost

My guess is colder air is condenser, meaning you truck has a little more power and has to work a little less hard. Every notice on real hot days your car or truck seems down on power and on cold days it has some extra pep. You actually have more power when colder. 70* might be the sweet spot also extreme cold can have the same affect as extremely hot.

The Wizard

Several posters mentioned Engine Not Broken In Yet.
Is that really an issue with modern engines anymore?
Do we expect maybe 1-2 mpg more after the first 5000 miles or so?
And what exactly "breaks in"? Are piston rings sealing better or something?

ptmccain

The manual says not to bother looking at your mileage until the engine has 1,000 miles on it.

FWIW.

Hobbs62

2.7l w/ 3.31 gears 2wd, 18 mpg at the pump doing math. Mix of hwy and neighborhood driving. Short round trips each day to work. Owned it a month, and feel the ford computed mpg is false advertising crap.

2.7Ecoboost

I would have to agree with you there. I also have an ultraguage and I'm getting about 18.5 mixed driving on this tank. The ultraguage seems to be accurate to what I'm actually getting. I'm at 2100 miles about to do my first oil change with Mobile 1 synthetic. I will see if that makes a difference.

NC_F150

Modern engines usually run the motor rich for X number of miles while it 'learns' your driving habits then after it reaches the right cycle (miles, starts, etc.) lets the computer do its own thing based on your driving.