I am going to test drive a 2003 g35 sedan AT in a couple of days. I am wanting to know how the maintenance and costs are. I live about 3 hours away from the closest infiniti dealership so I do not want to have to drive that long if something goes wrong and my local mechanic or I cant fix it myself. If it doesn't run then the towing fee for that far would be outrageous. Are there any major problems that usually occur in the 03's? How long do they last with oil change every 3k, all 30k flushes, etc.? Is the cost comparably more or less expensive than BMW or Lexus?