Who is using Iridium Spark plugs?

[NorthernAveo]

What brand and how long are you planning on keeping them in there for ?

For me, Champion Iridiums and I will be keeping them in if all works out for 100,000 miles with the odd inspection here and there.

[Wolfman AK907]

NGK's. I'll probably swap them at 30K.

[whitefish]

I'm not using Iridium now, but I'm thinking of switching. The original stock plugs were completely eroded at about 35,000 miles on my 2005. I had replaced them with NGK V Powers.

GM Owners Manual cites AC Delco Iridium plugs as replacements. Not sure why regular delco's were in there????