What is the longest lasting spark plug NGK platium or iridium?

(2012-02-05 15:20:13) 1. Dave M Says: Have an Astro van where the sparks are not easy to get at so want a spark plug that gives good performance for a long time.2. T D Says: Iridium lasts longest, but platinum will also last 100k+ miles.3. Knuckles Says: Iridium is exactly what you want. Reduced maintenance thru less electrode erosion.4. Pilsner Man Says: Just put platinums in. They are good for 100K, and by that time, that thing will be in a junk yard. Tag: What is the longest lasting spark plug NGK platium or iridium?