Very nice. Did you really get advised to run it in 5th, was this a manual or auto transmission?
Do you mind sharing the model/make of your WDH?
We just returned from a 30 day trip from East TN to CA and back with our 2015 Tacoma TRD Sport. Here's the facts:
6963 Miles/436.8 gallons = 15.97 mpg
Our mileage was definitely better coming east as opposed to going west. I kept the truck in 5th gear as advised by both the service tech and mechanic at the local Toyota dealer. We ran about 65 mph which seemed to be the "sweet spot" for the truck. I only used cruise on long, flat stretches of interstate and took it off for any hills. We were down to 45 mph going over the Loveland Pass west of Denver, but had plenty of power to pass if we needed it on level ground. We do use a WDH and sway bar, and the trailer was rock solid behind the truck. I had to look in the rearview mirror to make sure it was still there.
Edited by SnJD, 16 September 2015 - 03:32 PM.