MadocHandyman

I bought a cover to have the ability to lock up stuff in the back, ie: tools, supplies etc
It made absolutely no difference to my mileage that I could tell.

Truck owner

yeah, its proven bed covers weight added to truck negate the fuel savings, other than easier to drive on windy day. the next best thing is to drive with tailgate down to eliminate the wind resistance, used to do this all the time in my Super Duty on windy days or highway travel and it did make a difference in fuel consumption.

MadocHandyman

Actually, I believe Mythbusters also busted the tailgate down myth. I think they found it helped a little on old trucks but not the new ones.

Woolaroc

How much of a factor is this winter fuel (im in OK) have on the MPG. On the trip from Tulsa to KC I can usually get around 19mpg and in the city around 17. My trip a couple days ago to KC i got 16mpg and in the city around 14. Does the fuel cause a 3 mpg decrease, or could something else be going on. Also the air temp has dropped to avg around 35deg for my past 2 tanks this is based on.

hokieinidaho

That's part of the reason I don't hang out on these forums. It takes all kinds, they say. These guys confusing having power and using power. If you're not using the power, then you should be getting way better than what you're getting. Yeah, and the idiotic comments on the "hyunday" you'll just have to ignore. Kind of like the further references to "they've proven bed covers don't improve mileage" because of the added weight (15-30lbs making a difference in mileage on a vehicle that weighs 5200lbs?) Lots of opinions, based on very little experience. The same myth-buster guys said driving with the windows down doesn't affect mileage. You can't make a statement like that without consideration of all variables, which is why they retracted and did another study (at 60mph, instead of 45mph). All my vehicles have more than 2 discrete speeds. And they all have different profiles. For all of you out there convinced bed covers don't affect your mileage, good on ya. I bought the cover to keep things locked up, and experienced an additional 1 to 1.5 mpg.

Hang in there goodburbon, I hope you get it fixed. Don't get frustrated by the lacking support here.

engineermike

I'm having a tough time with this one, unless you were cruising at 55 mph all day. . . in which case the EB will approach 30. Your old truck was rated at 11 city/15 hwy.

I also had an older truck that was rated at 11/16 and all I could get was 13 with it, mostly highway, which my EB beats by 7+ mpg.

H-D Palmer

This string has been an interesting read relative to fuel economy. Small CI engines with inlet air pushers on them as the ecoboost has, make great power with your foot in it and deliver reasonable fuel econmy at light load. More throttle, more fuel. Less throttle, less fuel. Drag is an enemy to fuel economy. Higher speeds (70+) requires more power. Normal requirements of all gassoline engines regarding air temperature are higher air "inlet temp" will require less fuel, lower "inlet temp", more fuel. This is all common sence. The ecoboost uses an intercooler to reduce air inlet temperture for higher power output. In cooler weather, >50 degrees or so, there isn't a real need to cool the inlet air temp. The air inlet temp sensor is located just in front of the throttle body. This fall I too noticed a consderable reduction in fuel econmy when the temperture dropped. So, I made a cover for the intercooler and am now enjoying simulure milage to the summer months. However as many have noted it takes a bit longer for the system to warm enough for the converter to lock, so short tripping SUCKS in the winter. However on a recent 500 mile round trip to the north woods of Wisconsin, tempertures in the low to mid 40s our 2012 FX2 yield 22.8 MPG. That was primarily 2 lane driving, 60 to 70 MPH with an ocasional run to 80 and 90 MPH for passing. The truck has a 355 rear gear and over 8K miles. We were shocked that we did that whole trip on 1 tank of gass. We had never done that trip befor with any of our previous pickups on 1 tank.

budget rapta

all these people getting 22-23 on the highway make me want to drive my truck off a cliff. my best is 15 at 65 on cruise 600 mile trip. so frustrating

H-D Palmer

I assume you had a Ford dealer reprogram your PCM after the wheel/tire change as I did when I upgraded from 18s to the Ford 20s my first week of ownership. As it turned out, the speedo remained inaccurate (my Garmine GPS) and fuel milage wasn't as I expected either. After 3 different Florida dealers and 4,000 miles of strugeling with Ford Motor Co. it was finally discovered by my home town Wisconsin Ford dealer (4th dealer) that the PCM had been corrupted by the first dealer. They had to unload all the trucks data from the PCM and then reload the data to correct the problem. It turns out Ford was aware that this could happen with 2011 ecoboost vehicles and had thought it would not happen with the 2012s. They were wrong! After our truck was finally fixed it was like driving a different truck. Throttle response, shift points, milage, all different. We now have 8K miles on the truck and are quite pleased. Sence the problem has been resolved we have averaged 18.5 MPG over the last 4K miles. The short trip running around in these colder temps is what has brought that down. It was in the low 19s prior to the cold weather.

Joewee3.5

Take your truck to a part of the country with zero wind and a perfectly flat surface and you'll get 22 @ 65. Too bad that area doesn't exist. I've decided that people claiming 22mpg @70 are all lying.