Ok so now I am torn between the premium platinum AC plug or the iridium NGK.

maybe i can shine a little moer light on this subject, i've had several plugs, from the stock ac'* to the platnum 2'*, platnum 4'* and iridiums. My car has run the best with the plat4'* but that was when they were brand new, they seeem to have a problem with longtivity. I had the iridiums in my car for about 2 months and replaced them with the platnums, i noticed a difference. so what did someone say about the ngk platnums? i'm thinking of that for my next set. that i am going to purchase today...

Mansh, this is a really old post. 7 or 8 months ago.