I went to my local Toyota dealer to purchase spark plugs for my 2002
4-cyl Camry. The parts guy asked how many miles I had - I told him 72K. He said, "That vehicle has Iridium plugs - you should be good until 110- 115K miles."Wow! I've never heard of a spark plug that could go that long. I guess I don't mind paying $15 for each plug when they only have to be replaced every 4-5 years!