Been following this for along time in several posts, Bought my 2007 Expy NEW and have just under 130,000 miles on the original 2 piece plugs, still starts at the click of the key and is getting 18- 18.5 MPG in the north woods of Wisconsin where its COLD, scared of the thought of breaking them off is the reason they are still in there along with the fact that it just runs so good, Thought about trading it but after reading about the issues on here with new ones what is the point of spending $50-60 K or more ta boot on a new one when my old one is issue free ,also have NO cam Phaser noise, I change the engine oil every 5000 miles myself or my son does it for me using Motorcraft 5/30 with a Motorcraft filter, also flush the trans every 30 K , SO the question is, how many miles did you guys get out of the crappy 2 piece plugs, Thanks, John.