A couple of years ago, Joline and I went to Peru and one of the places we visited was Lake Titicaca @ 12,507 feet. At that altitude, walking up hill is not much fun; it takes a lot of energy to exert yourself in that thin air. Everest must be a bitch. I think the altitude at that Salar will pretty much preclude running a NA car there.
Regards, Neil Tucson, AZ