Yet Another Gas Mileage Thread

I'm on my third fifth gen. The first one got 18-19 around town, and 20-22 on trips. (I was pleasantly surprised that it exceeded what the EPA thought it should be getting). The second one (which had my Yakima rack on it) got about one MPG less, and I chalked that up to rack drag.
This one, also with the Yakima rack, is getting 14-15 around town, and 15-16 on trips. Seems like an awfully big discrepancy, but maybe not.
All have been SR5 4wd, original wheels and tires (TRD wheels on 1 and 3, standard snowflakes on the 2nd).

 

Most of the trips we take in Kansas are on interstate so driving right around 80 or so. We were getting 16ish with the rack and about 18 or so after we took it off on interstate.

 

I drive 80 miles round trip to and from my work daily. 98% is highway. My mpg is in the 18.8-19.2 range with bull bar mounted.

The handful of times I've taken her offroad she got much less but that's expected. Hauling a buddy's traveltrailer for a good 3.5 hours resulted in around 16 mpg which I was impressed with overall.