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Rich Buckner Rich Buckner is offline
Registered User
Join Date: Nov 2008
Location: Thousand Oaks, CA
Posts: 139
Don E,

I took a look at the NGK web site (excellent!!) and reviewed the specifications on your plugs. It is very interesting the the NGK heat range numbering systems rates a "9" as cold. This would correspond with the Bosch numbering system that is just the opposite, with "3" being a cold plug.

Your choice seems to reaffirm the factory rating.

Thank you for the incite.
Old 03-03-2010, 09:56 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)