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2012 5.0 4X4 with 3.73. I only have 2K miles, and have seen from 14.5 mpg with 90% city driving, to 21.5 mpg open road at less than 65mpg. Towing my 5500# travel trailer at 5500 ft. to 8500 ft. elevation I seem to average around 11.5 mpg. Mixed driving I average somewhere around 17.5.
I plan on driving about 1500 miles next week and can check back in to let you know the results. I did a lot of research before choosing the 5.0 and found the same results you have. They seem to be fairly close. My local dealers were not as interested in dealing on the EcoBoosts when I bought mine because they are selling so well in my area. I was able to save enough on the purchase price to more than make up for a small gain in fuel economy.
I love my 5.0, but the EB is a great engine. I don't think you'll be unhappy with either.
Life is not merely breathing---but doing, exploring and experiencing the adventures of life.
2012 F-150 Screw 4X4, 5.0, XLT Plus, Off-Road package, 3.73/e-locking diff. A.R.E shell with extras. Ranch Hand grille guard. Tinted Windows. Line-X bed liner.
my truck is pretty much brand new at this point. I have 1300 miles on currently.
2012 rcsb 5.0 2wd 3.31 gears. 100% stock thus far. tonneau cover went on friday night literally minutes before I bought my most recent tank of gas.
all 3 tanks so far have been between 17.5-19 mpg, hand calculated. my driving is a nice mix of traffic,open hwy, and back roads.
the mpg rreadout on the dash has been as low as 14.5 and as high as 25. as light as my truck is and with the 331 gears, I feel pretty confident as the truck/engine breaks in my mpg will go up a little bit, especially on all hwy trips
Basically brand new '12 Ecoboost, Lariat w/ all the options (noting this due to weight), including ORP w/ 3.73 electronic locking rear diff. So far I've averaged about 16.5 mpg lifetime but that's with a LOT of short trips and in town driving. I've seen about 20-21 MPG with just on highway keeping it between 65-70 (under 2K RPM on tach). On a recent long trip from home in south central PA to VA, through northern VA and Washington, DC where I sat in traffic for 1.5 hours, to Philly PA and back home, I averaged 18.6 mpg. I didn't think that too bad for an engine with under 1000 miles on it and sitting in traffic that long.