My 07 Tundra 4X4 DC LB 5.7V8 W/ARE MX Cap
My 07 Tundra had no problem towing the new Surveyor which weighs around 5 to 6k [I haven't weighed it yet]. Towed from Hamilton Ohio through KY and TN back to Charlotte area of NC. Averaged 10.5 MPG. Power was never an issue. I use 5th gear while towing [s-mode] - easy to downshift going down old fort mountain.
I've towed with a F350 4X4 Lariat 6.0 and the Tundra tows as well or better, rides much better, uses lower price fuel and gets equal MPGs. The Tundra got 19 MPG loaded with camping gear on the trip up to Ohio.
2011 Surveyor 235RKS, 07 Tundra 5.7, DC, 4x4; 2011 Take It EZ 14; 08 Toyota Highlander AWD V6;