Had the plugs changed by a mechanic about 2 years ago. This spring my intake manifold sprung a coolant link and was also changed. Shortly after that, COP #4 failed. I put in a replacement from a junk yard and that fixed the issue. Now #3 has failed. I can do a short term fix and get another salvage, but I think it is time for the full set to be replaced (about 200K miles on the original set in my 2000 Expy). I know that I have seen recommendations for good deals on well performing COP sets, but cannot seem to find them during my searches today. I was figuring that there may be new information on where to get the best priced set that is going to work well (not sure that I would trust the $56/set of 8 on Amazon).
Anyway, thank you for the advice. Still would like to know from others where they are now buying COP sets of 8 and how they are holding up.
Best,
John O