Towing 2720SD with 2006 Highlander Hybrid

Three weeks ago we bought a 2005 2720SD. We had been thinking of upgrading our TV from a 2006 Toyota Highander Hybrid to a 2009 non-hybrid Hghlander because the former has a 3500 pound towin capacity and the latter 5000 pounds. We stuck with the hybrid and have been very happy with the combination.

We just made a 1,700 mile round trip from Massachusett to Raleigh, NC with side trips to the Blue Ridge Mountains. Our MPG went down from 24 not towing to 17 when towing, except in the mountains wegot 13 mpg on one tank. On the interstates traveling at the speed limit was not problem, of course in the steep mountain grades we had be patient.