APT wrote:
Most people towing high walled RVs with a Frontier (or any mid-sized truck) do not keep the truck long. Some people find it acceptable, but not most. Everyone has different expectations about towing an RV. High walled RVs are hard work for the tow vehicle. That's why they all get 8-10mpg at 65mph. Are you prepared for cruising at 2500-3000rpm with downshifts on hills to 4000-5000rpm?
x2, BTDT. 06 Frontier towing 4050lb 22' TT. 8.5 mpg. You need to according to Nissan lockout OD. It will like APT said run at 2500-3000rpms. When we were towing on the freeway @63-65mph there was not much left on the gas pedal. Wasn't floored but when pressing down on it, it hardly accelerated much more. That told me it was pretty much maxed out. If you only travel on the flats with no strong head winds then you may be fine. If however you are in hilly or mountainous terrain then the Frontier will be hunting for gears all day.
FWIW we moved from the Frontier to an 08 F150 5.4 3.73's and went from 8.5 to 10.5 mpg. The towing experience also improved greatly.
From my personal experience I wouldn't go over 3000lbs loaded and on the lines of something like an R-Pod style or small Lance. The less frontal area the better.