Quote Originally Posted by curtis265 View Post
correct but why pay so much?

my service history indicates that the previous owner paid around $30/plug (total 120ish).... and coppers are only ~$7, so unless the iridium plugs are going to last at least 4 times longer, i wouldn't bother with the price hike.

I don't really recommend this, but you could also get a cheap socket set with a spark plug attachment for under $30 too.
Mine cost 80 total back then including fitting.

Well would going back to copper/20,000km plugs improve anything?
Ie. by changing copper plugs more frequently what are the benefits?

Like I said I've done 100,000km since I replaced the plugs nearly 4 years ago. I've never had to worry about them. How the tips currently look, I don't know, but my engine has never misfired/missed a beat.
Ill try using them until I reach the 110,000km mark.....which is another 8000km