My 99 daily driver just rolled 165,000 miles and is still tight and eager and dying to run hard every day. It could go anytime I guess, but I stay too busy with an insane work and driving schedule to worry much about the car blowing up, so we both just hunker down and go man, go!
As far as I know, it's on the original IMS and RMS. has never leaked or burned a drop of anything.
Not terribly scientific I guess, but there it is.
