<prompt> Human: I bought my current car 11 years ago for 4K. It is a 2000 model, has around 63K miles on it, and runs well. Every 3-5 years it seems like I have to replace the exhaust for 500 due to rust. I cant think of any way around this. Any other car I would buy would be used as I only drive around 10K miles per year and would run in to the same problem. Am I right in assuming that Im still keeping my car costs about as low as they can be? It just sucks to have to replace the exhaust so often. Those after-market parts must be junk.  <response>: IMO 500 every 3-5 years is very reasonable on a 18 year old vehicle.Thats like 8.00-14.00 a month. 