I just picked up my '03 Xterra, 2wd, AT. I made a trip from San Antonio to Dallas (~270 miles) and averaged 18.5 mpg. This was all highway miles, with no extra weight, averaging 75-80 mph, with the A/C on about 66% of the time. Now I'm not bitching about the mpg at all, just wondering if it's about right, because my 11 second V8 gets about 20 mpg on the freeway