Our 4.6 has plenty power to pull our 3000 appx pound camper. It cuts fuel mileage from 16 or so to well under 10 depending on how you drive it. if you want to drive speed limit up and down the hills in TX you might make 5-6 mpg.
It was used to tow a camper from VA to FL for a few years before we bought it. Snowbirding.
I had to replace one faulty shift sensor in the transmission after we bought it.
I have no clue about real mountains. But I suspect if you run it tow/haul and just take it easy and in no hurry it won't hurt a thing other than the fuel bill.
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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