yur not kidding,
I bought a new set to install the day before the annual airport drags. When I took the 4year old plugs out, they looked too good to change, so I screwed them back in.
That was 2004. The next morning they went 93 in the Eighth, and have been in there ever since........ so they were new in Fall of 1999. That was over ~100,000 miles ago.
