I mean, when I totaled my 99 Dakota R/T with 120k miles on it, the factory crosss hatching in cylinders was still there. That was the 5.9l Magnum engine. Ran nothing but Mobil1 synthetic and 3k oil changes.I read somewhere that this new bore tech went through durability testing and still had the cross hatching, and no lip, after a lot of miles. I get the feeling the Bores will last a really, really long time.