 I've had my 2008 Azera for 9 months, and have noticed the road noise inside the car to be very loud, compared to the 2006 Azera I still own, and my wife drives. I have adjusted the tire pressure on the Michelin tires, and still see no improvement. Both cars have the exact same tires, and maintain the same tire pressure. The dealer says "it is what it is", and couldn't explain why both cars would vary so much in road noise. I still have 1000's of miles wear left on these tires, and hope when the time comes to replace them, it will make a difference