I bought a used 2004 chevy impala at 30,000 miles or 50k 4 years ago and never got stranded or experienced any issues with it besides wear and tear. I am now at 112,000 miles or 187k on it and it still runs like new and still great body no rust. I live in Ontario, Canada and I have done plenty of highway with it including a trip to British Columbia and Oregon Coast with it 2 summers ago and plan to do another trip to California with it soon... I have to say the only issues I have got were little things before such as traction control and abs of course, but that problem went away last summer when I replaced the wheel bearings because the TC and abs have sensors on the bearings.
I like everything about the impala, they're reliable cars.
well someday we will have to find an alternative to gas, bio-deisel would be great or electric if they could be just as reliable