Oh...you told me...

I got the first letter right...

Of course the parts will wear down, but in this day and age it isn't possible to build a Perpetual Motion machine. The energy will run out, even if only after a very long time period.

I think the first example of a Perpetual Machine was a self-winding clock? Something to do with the hands going around that wound the clock...I don't know for sure. But it lasted a few hundred years before it finally stopped.

The energy will run out until we can find something that is 100% efficient. Until then, Perpetual Motion machines will always stop in the end.