I have a 2001 Accent with 97K miles on it. I have always changed the oil at or before the recommended intervals; in fact, for most of the life of the car I have changed the oil every 3k miles. I use nothing but Mobil 1. A few weeks ago, I started noticing a tapping sound from the engine. I assumed it was a lifter and took it to a dealer. The service dept. drug their heels every step of the way. They had the car several days and claimed there was not a problem. I told the service manager exactly what the problem was (by researching it at the Hyundai Service website). After a couple more days, their "technician" claimed that the engine had not been properly maintained (which is totally absurd, I have all the receipts except for one). In disgust, I picked up my car, the dealer all the time promising they would get back to me on servicing it under warranty. Of course, they haven't gotten back to me and it's 2 weeks later. Any suggestions on how to proceed next? JJ