回复：回复：火花塞没换过?12年都没换过?那马上换掉

Thanks. It's a city car with only 81k on it. At what mileage do you think the spark plugs have to be replaced? 

BTW, while I really like the car, it's showing its age. I was wondering when I should just move on instead of spending thousands of dollars to keep up with the repair. I probably put $2000 in it last year, mostly on common preventive cares (belts, timing belt, pipe leaks, etc) .