take it to a mechanic, and have them run a compression test. check the inside of the oil filler cap to make sure there is no whiteness in the oil, which means a coolant leak in the engine. if both these things check out fine, then this car will last you another 100k miles EASY, that is if you treat it right. 8500 for that kind of mileage is a good deal. run castrol syntec oil. don't skimp.