Gas mileage

Just got back from the pacific NW round up, trailer was unhooked 5 days, drove 65 miles without pod in tow. Here is how we did.
4386.8 km 21.12 L per 100 km
2725.8 m imp G 13.34 mpg
          us G 11.11 mpg
How ever driving through the mountains and coastal highway is neither good for getting anywhere fast or getting good miles per gallon.
The last leg of our trip was from Mount Robson BC to Edmonton AB,
456.8 km, 283.89m we could drive more or less normal highway speed we did 14.42m per imp G- 12m per us G and 19.68 L per 100 km.

The ford limped home in a mode where it shuts off air and reduces speed and shifting function. This started after entering Alaska at Tok. We drove in heavy rain from took to Denali. The ford started by acting like it was misfiring in 6th gear. I switched to premium fuel while in Alaska.
On our return we left Tok in a torrential down pour and soon hit road construction where mud and potholes were pretty bad. It was during this 20 mile stretch when the ford wrench indicator came on with a check engine light. We then went into the limp mode. Then on highway 37 in a heavy rain I was going to pass a small trailer and suv. The ford almost died and I realized how limited this mode is. After being home for 3 days in dry weather the wrench indicator left and the check engine light went away. I have an appointment Tuesday to check if anything can be found. I made a trip to town yesterday (200 miles)to pick up mu lab and all went well except for a little 6th gear misfire.
Ron

Originally posted by Norsk1 Trailer did well but the Ford limped home. For the weight of the trailer it seems like we would have had better gas mileage. Also the speed limits were 50 to 60 miles per hour or lower. Ron

Please elaborate on the "Ford limped home" part.   I've been curious about the different EcoBoost engine's performance and mileage, especially with the class action lawsuit about the 3.5L EcoBoost problems. 
Before I retired in June I put 30,000 miles on a Ford Ecoboost Escape AWD with the 1.6L engine.
Very impressive performance for such a small engine.  However gas mileage was never anywhere near what Ford claims, something like 32mpg. 
Never saw over 25 and even that was rare, usually around 22/23.

From central coast of California to Yellowstone and back..got 14 mpg towing 179 with 2001 f350 power stroke keeping it at 1900 rpms.....67 mph...pretty stoked, but a total of 3200 miles was still a lot of $. !!!  Still beats a hotel room without a view driving a Prius...... !!!!!!!

My maiden voyage with our 177 was a couple of weeks ago, towing 660 miles from Omaha to Colorado with a 2004 Durango (4.7 liter V-8).  Averaged about 11 mpg, driving about 65 mph or a bit more, with a moderate cross- or headwind most of the way.  Can't see myself driving much slower than that, so I'm prepared to grin and bear it (and pray for sub-$3/gallon gas to return!).