Blah, I just spent 50 bucks on NGK's IKR20's.

They were selling plugs for $2.50 a piece but those weren't meant for the way I drive. =)

 

IKR20? Never heard of it... I don't think. Is it irridium or platinum?
I use copper plugs... come to think of it, I should throw a new set in. I planned on swapping every 10k with new ones.

 

Oops, got my plugs mixed up. Denso IK20's and yes they are irridium. My local auto supplier didn't have any IK22's and I was in need of new plugs. The night of getting my chip, I was doing mild pulls on the highway. A CEL flashed at me with three codes. Multiple Cylinder misfire, Missfire cylinder 3 and cylinder 4. Also, I was getting major surging.

http://www.audigeeks.com/forums/index.php?topic=56.0

That link above is good reading material. I thought it made alot of sense.