This thread may be too old to count, but after 176K my SC seems to be doing fine. I pulled the SC back at about 100K when doing an alternator R&R and replaced the gaskets (IIRC) and changed the oil. This winter at about 170K I replaced the oil (by using a long tube and sucking it out of front & rear and that's about it.
I am starting to think about what parts to stock up on to do some sort of "200K" party, like new shocks & bushings, motor mounts, all the stuff that hasn't gone south on me yet.

 

I've got over 130,000 miles on my SC and it seems to be doing just fine. It's making great boost, isn't leaking, and not making any weird sounds. I figured that it's not worth it to pull it off and do an oil change on it......I'm just going to leave it until I still having issues....and then replace it with a rebuilt unit.

 

Reading my earlier posts in this thread. Funny to see how much I've learned over the years. After 160,000 miles, my supercharger finally bought the farm.

There's a TVS900 in my not-too-distant future.

 

Haha, yeah. I got nervious around 190,000 and replaced mine with a newer one. Then when I rebuilt my engine at 366,000 I noticed that the “newer” supercharger wasn’t don’t do well, so I put my old one back on. The plan was to rebuild it, but never did. So currently it is somewhere north of 230,000 miles. Most of it with a 15%pulley.

Nik

 

That is most impressive, especially with the gears on both ends. It's ain't broke don't fix it.

 

I'm almost at 160,000 miles......still no issues (knock on wood).

 

OK, I am at 211,000 miles on my original JCW supercharger. Just did an oil change in conjunction with a radiator replacement. Put one of those SC EZ oil change kits on and hope to get another couple hundred thousand more out of it.