So I have a Honda Civic LX. She is 20 years old with about 70,200 miles on her. I bought the car from my grandma about two years ago with about 50,000 miles on her. My sister and I both learned how to drive on her. My grandma drove the car very little in its first 18 years. Since buying her, I Drive it daily to and from work, sometimes twice a day. I usually drive between 8-20miles a day, give or take some. Since buying her two years ago these are the repairs I have gotten done - new muffler - some new belts (not quite sure what they were called - new radiator and water pump - new timing belt (And possibly another thing or two, just can't think of it all) She is now making a rattle sound in certain rpms and a buzzing sound when accelerating. I'm going to take her a mechanic this week, but i'm guessing she needs a new exhaust system/catalytic converters. In your thoughts and opinions, should I spend the money to get her fixed? Or just drive her until sh...