1 year and ~17kmi old, my stock '14 T4R TEP has been on a few X/C trips, 2kmi each. Most days its empty and a DD. Long road trips it's typically loaded with me, an annoying dog, a laptop, clothes for a week, a few rifle cases, and around 200 lbs of ammo. On the return trip, we change out at least 100 lbs of ammo for several cases of Yuengling!
Being an Oklahoma truck most of the speed limits on our interstates are 75, I drive a country highway with a 65 limit to work every day. So my trucks spends it's life either parked or 60+. I also have a leadfoot, though don't usually let it get above 3000rpm during acceleration.
I have noticed a big drop in mileage at anything above 70. I'll consistently get 19+ below 70, but above 70 it starts to drop like a rock. Then you have to consider the Oklahoma wind, almost always it's an extra 20mph against me, sometimes it's a little help. DD across 20 miles of country highway, 3 red lights, and little traffic, mileage is pretty steady 17.5-19 depending on the week and wind.
X/C trips I usually see around 16.5-18 depending on which state I'm in, and how close to 80 I'm pushing it. Recently I've been trying to keep off the interstates and more on US routes as it helps my fuel economy, is more peaceful to drive, and country folk don't look at you weird for walking around with a .45 in a holster. On these routes over the course of a tank I'll see closer to 21-23, but rarely get above 65 as every town smokey wants to bring some income for their little town.
