I am on my 2nd 2.7L. Toyota. I bought an 05 with a manual tran. when the first came out. I got tired of shifting and bought a new 07 Tacoma with an automatic just last week. They offered me so much for my 05 with 68000 miles on it that I did not have to sell it myself. High resale is one great advantage of owning a Toyota.
I live in the MTS so if you live on the flats you may get better mileage, but I averaged 24 MPG, when towing it went down to 20, 21 mpg in my 05. When I added my 605 lb ATV in the back of the truck along with the 13' Scamp
it went down to about 19. The power was more than adequate. First tank with my 07 is 24 mpg with less than 700 miles on it.
I have towed a Trillium
4500 3 times and it really slowed me down compared to my Scamp
. On hills I was always one gear lower than with my Scamp
. On the flat I could use 5th gear when towing my Scamp, with the Trillium
I could not. I have a standard cab, the Acess cab is going to weigh more.
The last time I towed the Trillium was to weigh both the Scamp and the Trillium. At the time the Trillium was empty. No water or battery
. The Scamp was ready for camping with the exception of no water. The Trillium weighed only 110 lbs. more than the Scamp but it was not camping ready.
If my truck had been a six cylinder I would have kept the Trillium because of the extra room.
Tow ratings are based on towing on flat ground and with no headwind!
Hope this helps,