It makes no sense at all. 42 HWY and 27 City should be mutually exclusive.

Vegas, to where? Salt Lake City? I could buy it. To LA??? You've got Halloran Summit and the 10 mile climb out of Baker with gusty, variable winds. No way. I get maybe 36 on that run, at night with cool dense air.

As for the 27mpg... do you haul a lot of gear around? Passengers? Are you a, uhhh... large fellow? I'm 210 myself and when I haul my training case full of hydraulic crap plus suitcases, it does make a difference.

How about cheap gas?

I've got nearly the same miles as you and I'm seeing 33 avg and 35-ish if I really try hard with maybe 60/40 fwy vs. surface streets.