Originally Posted by IronJoce
You're going too fast for good MPG and use regular gas. I don't know about others but I get better mileage (when towing) using 91 octane. On flat road I can average 12 on a good day cruising at 60 with 70PSI in my tires and my trailer is about 7600lbs.
I'm also under the impression that 5th wheels are a bit more aerodynamic than TTs.
I agree about the speed thing. We set the cruise at 62-65 depending on the road and traffic. I usually run 91 or 93 gas when towing the 5er.
My truck has 3.73's and I just put on Michelin LTX A/T2 LT285/55R20's. They are a load range E tire and I pumped them to 70 PSI all way around. The camper tires are also at 70 psi. Recommended to add 5-10 psi over the max in trailer tires to run above 65 mph but I usually didn't go that fast...well at least not for very long when I did run down hills.
I agree also that 5ers are a little aerodynamic and they haul easier too. No white knuckle rides for me. Set cruise and drive, checking the mirrors every few seconds or so and listen to the tunes.