When I first bought my 32' Fleetwood Tioga, I headed west from Ohio to California. I did not tow, but through Wisconsin, up to Minnesota to visit relatives, and through Nebraska and uphill through all of Wyoming, the temps were 95 -100 degrees. I was convinced that my temperature gage was broken because it never moved past the exact middle of the gage! Overheated cars littered the shoulders of I-80 the entire way, but my V-10 Superduty Ford chassis just kept going. It was amazing, and obviously, my temperature gage was fine--just a good engine and terrific cooling system.
It can be a noisy engine, but it just turned over 154,000 miles, and I plan on putting another 150k on it before I quit.