Same thing with mine. Just wasn't worth it anymore. Now I'm driving a Mazda3. Would have loved a Mazdaspeed, but one of the reasons for getting the Mazda was the mpg. The speed isn't a whole lot greater than the Xterra - at least not how I would have driven it. And it would have just been an invitation to speeding tickets.
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"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist