Quote Originally Posted by wayne28 View Post
What is the difference between platinum and iridium? I asked an auto supply along jp rizal just this morning and was surprised to know the difference of prices between the 2 plugs. ordinary plugs are priced at 90php each platinum at 175php each while iridium is 650php each. are platimun plugs good enough? how long does platinum plugs last compared to ordinary and iridium?
I think most of your questions can be answered in the link:
http://www.densoiridium.com/faq.php

http://www.automedia.com/Iridium_Spa...ht20010101ds/1