I may pay extra but I take the X to the dealer to perform all scheduled service. I have been more than pleased so far. After the last service I noticed Nissan of Hickory (NC) had cleaned the truck and glossed the tires. It looked VERY good. I asked what product was used for the tire shine, and the service dept indicated it was something only available through Nissan for dealers. I was not given a name for the product, but I'll bet it lasted at least 3 weeks, even in several rain showers.

What have you guys and gals seen that keeps your X with showroom looking tires?