Anytime you're about to put 1000 miles on your car, it is always worth considering renting, unless you have no $$ and your car is worthless too.

Then again, if you have an older, slightly or truly junk car, you may never make it to your destination.
That's true for me, I have a twenty year old BMW that has been a great car, but at this point, I won't drive it much more than 30 miles from home. Not worth the potential hassle.