I-160 is a pretty good road but there are some real high climbs and steep descents especially Wolf Creek Pass. The pass is an 8 mile climb with switchbacks, a slow lane, and lots of places to pull off to cool your engine or brakes. We went thru there two years ago in a 34' Journey with a 350 hp Cat and engine brake which we used all the way down the back side going east. Our engine did start to over heat climbing but that was our fault as we forgot to turn off the AC which was on high, however, as soon as we turned off the AC the engine temperature came right down. Watch your engine RPMs climbing and be in the right gear. I'm not sure how a gas rig would do on Wolf Creek Pass but I'm sure plenty have done it. Good Luck and Happy Travels!