Description

This article is from the VW Technical FAQ, by with numerous contributions by Jan Vandenbrande others.

28 Why is the G60 plug 15US$? What's so special about it?

A: The WR6DP0/W6DP0 plug is closer to a performance plug because it gap is not
covered with the little prong but rather exposed to the combustion
chamber. Supposedly it gives you a better combustion and the engine runs
cleaner. It's also a Platinum plug.
The final character "0" designates this

Conventional:

          ===   <==Gap
         // []
        -------

           Gap
           \/
 
          = []
         // []
        -------

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