Should I trade my car for a new one?

[bad_habiots]

Ok i drive a 2007 kia,I still owe two years on it but most of it is interest because I got screwed over by drive time the car is worth 6-8k kelly bluebook.But it has 90k miles and I can tell it might not make to 100-150k unlike my nissan that was bought new and well maintained,So i want to start with a clean car not used.but here is where i need peoples help is it worth to trade it in or just pay it off then get something new,I know i will pay a bigger loan but I just don't thank this kia is going to last to more years with out needing some kind of repairs.