Just traded an 05, 38', 28,000 lb Travel Supreme w/350 cat w/ turbo. Now have a 2013 40' HR 32,000lbs w/350 MaxForce 10 w/turbo. TS averaged 7mpg towing an 11 Edge. Have 1100 miles on the HR and averaging just under 9 mpg towing the same Edge. Power fells pretty much the same, even with higher load.