Hi,
there are similar questions posted. Basically the answer is that you've bought the car, it's a sunk cost, so don't worry about it - just get back what you can. The cost of *keeping* the thing (further depreciation, running costs) will be much worse the longer you do (until 10 years from now, say!).
Sell it now, take the $6-8k hit, move on. You replace it with an equally functional vehicle but without the debt. Or at least with much less of it!
Good luck.