Anonymous wrote:OP here, thanks for the input. I do understand cars require maintenance, but I am trying to figure out the point at which it's a waste of money on the old car, as compared to getting a new car.
For example, let's say the engine does die at 100k miles and engine replacement is $8k. That's probably the value of the car ... but a lot cheaper than a new car.
If you wouldn't do that replacement, then does that affect how willing you are to replace tires or other systems in the years leading up, again as compared to a new car (not as compared to driving with bald tires).
New engine, no get rid of it. Tires, brakes and general stuff keep.