I've owned my Blazer for over twenty years and driven the wheels off it the entire time. When I bought it, the clock read something like 60,000 miles (most likely 160,000 miles). I then put on another 40,000 miles to see the clock roll over the first time and rebuilt the engine. I then put another 100,000 miles on it to see the clock roll over a second time. Well, I just watched it roll over for the third time the other day! Perfect timing too, because I just dropped in a fresh 383 stroker and the odometer will now be sync'd up with the actual miles on the engine. Maybe I can challenge that famous million mile Volvo, if there is still gas available for the next few decades