I predict you are going to get trumped by a big rig driver.
The replacement intervals on those approach half a million miles.
Yep, when I had mine done in my Volvo 770 I had 750,000 miles on it.
I have to ask. How big is the flywheel/clutch on those things?
flywheel is ~2 to 2 and half feet, about 3 inches thick, and weighs about 75 pounds
Yeah, it's like a man hole cover.